A port link power management (LPM) policy can be controlled using the
link_power_management_policy sysfs host attribute. However, this
attribute exists also for hosts that do not support LPM and in such
case, attempting to change the LPM policy for the host (port) will fail
with -EOPNOTSUPP.
Introduce the new sysfs link_power_management_supported host attribute
to indicate to the user if a the port and the devices connected to the
port for the host support LPM, which implies that the
link_power_management_policy attribute can be used.
Since checking that a port and its devices support LPM is common between
the new ata_scsi_lpm_supported_show() function and the existing
ata_scsi_lpm_store() function, the new helper ata_scsi_lpm_supported()
is introduced.
Fixes: 413e800cad ("ata: libata-sata: Disallow changing LPM state if not supported")
Reported-by: Borah, Chaitanya Kumar <chaitanya.kumar.borah@intel.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202507251014.a5becc3b-lkp@intel.com
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Introduce struct ata_reset_operations to aggregate in a single structure
the definitions of the 4 reset methods (prereset, softreset, hardreset
and postreset) for a port. This new structure is used in struct ata_port
to define the reset methods for a regular port (reset field) and for a
port-multiplier port (pmp_reset field). A pointer to either of these
fields replaces the 4 reset method arguments passed to ata_eh_recover()
and ata_eh_reset().
The definition of the reset methods for all drivers is changed to use
the reset and pmp_reset fields in struct ata_port_operations.
A large number of files is modifed, but no functional changes are
introduced.
Suggested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20250716020315.235457-3-dlemoal@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
The only reason for ata_do_eh() to exist is that the two caller sites,
ata_std_error_handler() and ata_sff_error_handler() may pass it a
NULL hardreset operation so that the built-in (generic) hardreset
operation for a driver is ignored if the adapter SCR access is not
available.
However, ata_std_error_handler() and ata_sff_error_handler()
modifications of the hardreset port operation can easily be combined as
they are mutually exclusive. That is, a driver using sata_std_hardreset()
as its hardreset operation cannot use sata_sff_hardreset() and
vice-versa.
With this observation, ata_do_eh() can be removed and its code moved to
ata_std_error_handler(). The condition used to ignore the built-in
hardreset port operation is modified to be the one that was used in
ata_sff_error_handler(). This requires defining a stub for the function
sata_sff_hardreset() to avoid compilation errors when CONFIG_ATA_SFF is
not enabled. Furthermore, instead of modifying the local hardreset
operation definition, set the ATA_LFLAG_NO_HRST link flag to prevent
the use of built-in hardreset methods for ports without a valid scr_read
function. This flag is checked in ata_eh_reset() and if set, the
hardreset method is ignored.
This change simplifies ata_sff_error_handler() as this function now only
needs to call ata_std_error_handler().
No functional changes.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20250716020315.235457-2-dlemoal@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
With the renaming of libata-eh ata_set_mode() function to
ata_eh_set_mode(), libata-core function ata_do_set_mode() can now be
renamed to the simpler ata_set_mode().
All the call sites of the former ata_do_set_mode() are updated to use
the new function name.
No functional changes.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250703103622.291272-5-dlemoal@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
The function ata_log_supported() tests if a log page is supported by a
device using the General Purpose Log Directory log page, which lists the
size of all surported log pages. However, this log page is read from the
device using ata_read_log_page() every time ata_log_supported() is
called. That is not necessary.
Avoid reading the General Purpose Log Directory log page by caching its
content in the gp_log_dir buffer defined as part of struct ata_device.
The functions ata_read_log_directory() and ata_clear_log_directory() are
introduced to manage this buffer. ata_clear_log_directory() zero-fill
the gp_log_dir buffer every time ata_dev_configure() is called, that is,
when the device is first scanned and when it is being revalidated.
The function ata_log_supported() is modified to call
ata_read_log_directory() instead of ata_read_log_page().
The function ata_read_log_directory() calls ata_read_log_page() to read
the General Purpose Log Directory log page from the device only if the
first 16-bits word of the log is not equal to 0x0001, that is, it is not
equal to the ACS mandated value for the log version.
With this, the log page is read from the device only once for every
ata_dev_configure() call. For instance, with pr_debug enabled, a call
to ata_dev_configure() before this patch generates the following log
page accesses:
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x13, page 0x0
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x12, page 0x0
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x30, page 0x8
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x30, page 0x3
ata3.00: read log page - log 0x30, page 0x4
ata3.00: read log page - log 0x18, page 0x0
That is, the general purpose log directory page is read 7 times.
With this patch applied, the number of accesses to this log page is
reduced to one:
ata3.00: read log page - log 0x0, page 0x0
ata3.00: read log page - log 0x13, page 0x0
ata3.00: read log page - log 0x12, page 0x0
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x30, page 0x8
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x30, page 0x0
ata3.00: read log page - log 0x30, page 0x3
ata3.00: read log page - log 0x30, page 0x4
ata3.00: read log page - log 0x18, page 0x0
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Link: https://lore.kernel.org/r/20250703103622.291272-2-dlemoal@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Improve the comment describing enum ata_lpm_policy and add comments
within that enum to describe each of the different possible values.
The enum values comments match the description given for the
CONFIG_SATA_MOBILE_LPM_POLICY config parameter.
No functional changes.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
The ATA device flag ATA_DFLAG_ZAC is used to indicate if a devie is a
host managed or host aware zoned device. However, this flag is not used
in the hot path and only used during device scanning/revalidation and
for inquiry and sense SCSI command translation.
Save one bit from struct ata_device flags field by replacing this flag
with the internal helper function ata_dev_is_zac(). This function
returns true if the device class is ATA_DEV_ZAC (host managed ZAC device
case) or if its identify data reports it supports the zoned command set
(host aware ZAC device case).
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
On at least an ASRock 990FX Extreme 4 with a VIA VT6330, the devices
have not yet been enabled by the first time ata_acpi_cbl_80wire() is
called. This means that the ata_for_each_dev loop is never entered,
and a 40 wire cable is assumed.
The VIA controller on this board does not report the cable in the PCI
config space, thus having to fall back to ACPI even though no SATA
bridge is present.
The _GTM values are correctly reported by the firmware through ACPI,
which has already set up faster transfer modes, but due to the above
the controller is forced down to a maximum of UDMA/33.
Resolve this by modifying ata_acpi_cbl_80wire() to directly return the
cable type. First, an unknown cable is assumed which preserves the mode
set by the firmware, and then on subsequent calls when the devices have
been enabled, an 80 wire cable is correctly detected.
Since the function now directly returns the cable type, it is renamed
to ata_acpi_cbl_pata_type().
Signed-off-by: Tasos Sahanidis <tasos@tasossah.com>
Link: https://lore.kernel.org/r/20250519085945.1399466-1-tasos@tasossah.com
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Commit affccb16c1 ("ata: ahci: print the lpm policy on boot") added a
lpm-pol print during boot, which shows the LPM policy used by each port.
While the LPM policy is usually determined by the Kconfig
CONFIG_SATA_MOBILE_LPM_POLICY, the Kconfig value is overridden e.g. if
firmware has marked the port as hotplug capable / external.
Commit f97106b10d ("ata: ahci: Add debug print for external port") did
add a debug print to show if LPM was disabled because firmware has marked
the port as external, however, because devices having broken LPM (even
though they claim to support it) is more common than one would have hoped,
print "ext" during boot if firmware has marked the port is external.
This will make it easier to debug certain LPM issues, e.g. if firmware has
enabled/marked only some of the ports as hotplug capable / external.
Before (port marked as external by firmware):
ata1: SATA max UDMA/133 abar m4096@0xfebd3000 port 0xfebd3100 irq 57 lpm-pol 0
After (port marked as external by firmware):
ata1: SATA max UDMA/133 abar m4096@0xfebd3000 port 0xfebd3100 irq 57 lpm-pol 0 ext
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Use dev_dbg_once() instead of open-coding the once functionality.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
- Fix a regression on ATI AHCI controllers, where certain Samsung
drives fails to be detected on a warm boot when LPM is enabled.
LPM on ATI AHCI works fine with other drives. Likewise, the
Samsung drives works fine with LPM with other AHI controllers.
Thus, just like the weirdo ATA_QUIRK_NO_NCQ_ON_ATI quirk, add a
new ATA_QUIRK_NO_LPM_ON_ATI quirk to disable LPM only on ATI
AHCI controllers.
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Merge tag 'ata-6.14-final' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux
Pull ata fix from Niklas Cassel:
- Fix a regression on ATI AHCI controllers, where certain Samsung
drives fails to be detected on a warm boot when LPM is enabled.
LPM on ATI AHCI works fine with other drives. Likewise, the
Samsung drives works fine with LPM with other AHI controllers.
Thus, just like the weirdo ATA_QUIRK_NO_NCQ_ON_ATI quirk, add a
new ATA_QUIRK_NO_LPM_ON_ATI quirk to disable LPM only on ATI
AHCI controllers.
* tag 'ata-6.14-final' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux:
ata: libata-core: Add ATA_QUIRK_NO_LPM_ON_ATI for certain Samsung SSDs
Before commit 7627a0edef ("ata: ahci: Drop low power policy board type")
the ATI AHCI controllers specified board type 'board_ahci' rather than
board type 'board_ahci'. This means that LPM was historically not enabled
for the ATI AHCI controllers.
By looking at commit 7a8526a5cd ("libata: Add ATA_HORKAGE_NO_NCQ_ON_ATI
for Samsung 860 and 870 SSD."), it is clear that, for some unknown reason,
that Samsung SSDs do not play nice with ATI AHCI controllers. (When using
other AHCI controllers, NCQ can be enabled on these Samsung SSDs without
issues.)
In a similar way, from user reports, it is clear the ATI AHCI controllers
can enable LPM on e.g. Maxtor HDDs perfectly fine, but when enabling LPM
on certain Samsung SSDs, things break. (E.g. the SSDs will not get detected
by the ATI AHCI controller even after a COMRESET.)
Yet, when using LPM on these Samsung SSDs with other AHCI controllers, e.g.
Intel AHCI controllers, these Samsung drives appear to work perfectly fine.
Considering that the combination of ATI + Samsung, for some unknown reason,
does not seem to work well, disable LPM when detecting an ATI AHCI
controller with a problematic Samsung SSD.
Apply this new ATA_QUIRK_NO_LPM_ON_ATI quirk for all Samsung SSDs that have
already been reported to not play nice with ATI (ATA_QUIRK_NO_NCQ_ON_ATI).
Fixes: 7627a0edef ("ata: ahci: Drop low power policy board type")
Suggested-by: Hans de Goede <hdegoede@redhat.com>
Reported-by: Eric <eric.4.debian@grabatoulnz.fr>
Closes: https://lore.kernel.org/linux-ide/Z8SBZMBjvVXA7OAK@eldamar.lan/
Tested-by: Eric <eric.4.debian@grabatoulnz.fr>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20250317170348.1748671-2-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Updates to the usual drivers (ufs, lpfc, fnic, qla2xx, mpi3mr) The
major core change is the renaming of the slave_ methods plus a bit of
constification. The rest are minor updates and fixes.
Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, lpfc, fnic, qla2xx, mpi3mr).
The major core change is the renaming of the slave_ methods plus a bit
of constification. The rest are minor updates and fixes"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (103 commits)
scsi: fnic: Propagate SCSI error code from fnic_scsi_drv_init()
scsi: fnic: Test for memory allocation failure and return error code
scsi: fnic: Return appropriate error code from failure of scsi drv init
scsi: fnic: Return appropriate error code for mem alloc failure
scsi: fnic: Remove always-true IS_FNIC_FCP_INITIATOR macro
scsi: fnic: Fix use of uninitialized value in debug message
scsi: fnic: Delete incorrect debugfs error handling
scsi: fnic: Remove unnecessary else to fix warning in FDLS FIP
scsi: fnic: Remove extern definition from .c files
scsi: fnic: Remove unnecessary else and unnecessary break in FDLS
scsi: mpi3mr: Fix possible crash when setting up bsg fails
scsi: ufs: bsg: Set bsg_queue to NULL after removal
scsi: ufs: bsg: Delete bsg_dev when setting up bsg fails
scsi: st: Don't set pos_unknown just after device recognition
scsi: aic7xxx: Fix build 'aicasm' warning
scsi: Revert "scsi: ufs: core: Probe for EXT_IID support"
scsi: storvsc: Ratelimit warning logs to prevent VM denial of service
scsi: scsi_debug: Constify sdebug_driver_template
scsi: documentation: Corrections for struct updates
scsi: driver-api: documentation: Change what is added to docbook
...
Use a plain BLK_MQ_F_* flag to select the round robin tag selection
instead of overlaying an enum with just two possible values into the
flags space.
Doing so allows adding a BLK_MQ_F_MAX sentinel for simplified overflow
checking in the messy debugfs helpers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20250106083531.799976-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Improve naming consistency with the .sdev_prep() and .sdev_destroy()
methods by renaming .device_configure() into .sdev_configure().
Cc: Christoph Hellwig <hch@lst.de>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20241022180839.2712439-3-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Rename .slave_alloc() into .sdev_init() and .slave_destroy() into
.sdev_destroy(). The new names make it clear that these are actions on
SCSI devices. Make this change in the SCSI core, SCSI drivers and also
in the ATA drivers. No functionality has been changed.
This patch has been created as follows:
* Change the text "slave_alloc" into "sdev_init" in all source files
except those in drivers/net/ and Documentation/.
* Change the text "slave_destroy" into "sdev_destroy" in all source
files except those in drivers/net/ and Documentation/.
* Rename lpfc_no_slave() into lpfc_no_sdev().
* Manually adjust whitespace where necessary to restore vertical
alignment (dc395x driver and include/linux/libata.h).
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20241022180839.2712439-2-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The ncq_sense_buf buffer field of struct ata_port is allocated and used
only for devices that support the Command Duration Limits (CDL) feature.
However, the cdl buffer of struct ata_device, which is used to cache the
command duration limits log page for devices supporting CDL is always
allocated as part of struct ata_device, which is wasteful of memory for
devices that do not support this feature.
Clean this up by defining both buffers as part of the new ata_cdl
structure and allocating this structure only for devices that support
the CDL feature. This new structure is attached to struct ata_device
using the cdl pointer.
The functions ata_dev_init_cdl_resources() and
ata_dev_cleanup_cdl_resources() are defined to manage this new structure
allocation, initialization and freeing when a port is removed or a
device disabled. ata_dev_init_cdl_resources() is called from
ata_dev_config_cdl() only for devices that support CDL.
ata_dev_cleanup_cdl_resources() is called from ata_dev_free_resources()
to free the ata_cdl structure when a device is being disabled by EH.
Note that the name of the former cdl log buffer of struct ata_device is
changed to desc_log_buf to make it clearer that it is a buffer for the
limit descriptors log page.
This change reduces the size of struct ata_device, thus reducing memory
usage for ATA devices that do not support the CDL feature.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
The 512B buffer sector_buf field of struct ata_port is used for scanning
devices as well as during error recovery with ata EH. This buffer is
thus useless if a port does not have a device connected to it.
And also given that commands using this buffer are issued to devices,
and not to ports, move this buffer definition from struct ata_port to
struct ata_device.
This change slightly increases system memory usage for systems using a
port-multiplier as in that case we do not need a per-device buffer for
scanning devices (PMP does not allow parallel scanning) nor for EH (as
when entering EH we are guaranteed that all commands to all devices
connected to the PMP have completed or have been aborted). However,
this change reduces memory usage on systems that have many ports with
only few devices rives connected, which is a much more common use case
than the PMP use case.
Suggested-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
The function ata_eh_read_sense_success_ncq_log() does more that just
reading the sense data for successful NCQ commands log page as it also
sets the sense data for all commands listed in the log page.
Rename this function to ata_eh_get_ncq_success_sense() to better
describe what the function does. Furthermore, since this function is
only called from ata_eh_get_success_sense() in libata-eh.c, there is no
need to export it and its declaration can be moved to
drivers/ata/libata.h.
To be consistent with this change, the function
ata_eh_read_sense_success_non_ncq() is also renamed to
ata_eh_get_non_ncq_success_sense().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Unlike ata_std_prereset() and ata_std_postreset(), the function
sata_std_hardreset() applies only to SATA devices, as its name implies.
So move its definition to libata-sata.c.
Together with this, also move the definition of sata_port_ops to
libata-sata.c, where it belongs.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
The function ata_schedule_scsi_eh() was removed with commit
f8bbfc247e ("[PATCH] SCSI: make scsi_implement_eh() generic API for
SCSI transports"), and the function ata_sff_irq_clear() was removed
with commit 37f65b8bc262("libata-sff: ata_sff_irq_clear() is BMDMA
specific").
Remove the now useless declarations of these functions in
drivers/ata/libata.h and include/linux/libata.h.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
In ata_dev_print_quirks(), return early if ata_dev_print_info() returns
false or if we already printed quirk information. This is to avoid
printing a device quirks multiple times (that is, each time
ata_dev_revalidate() is called).
To remember if ata_dev_print_quirks() was already executed, define the
EH context flag ATA_EHI_DID_PRINT_QUIRKS and set this flag in
ata_dev_print_quirks().
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: 58157d607a ("ata: libata: Print quirks applied to devices")
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
The function ata_noop_qc_prep(), as its name implies, does nothing and
simply returns AC_ERR_OK. For drivers that do not need any special
preparations of queued commands, we can avoid having to define struct
ata_port qc_prep operation by simply testing if that operation is
defined or not in ata_qc_issue(). Make this change and remove
ata_noop_qc_prep().
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Introduce the function ata_dev_print_quirks() to print the quirk flags
that will be applied to a scanned device. This new function is called
from ata_dev_quirks() when a match on a device model or device model
and revision is found for a device in the __ata_dev_quirks array.
To implement this function, the ATA_QUIRK_ flags are redefined using
the new enum ata_quirk which defines the bit shift for each quirk
flag. The array of strings ata_quirk_names is used to define the name
of each flag, which are printed by ata_dev_print_quirks().
Example output for a device listed in the __ata_dev_quirks array and
which has the ATA_QUIRK_DISABLE flag applied:
[10193.461270] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[10193.469190] ata1.00: Model 'ASMT109x- Config', rev '2143 5', applying quirks: disable
[10193.469195] ata1.00: unsupported device, disabling
[10193.481564] ata1.00: disable device
enum ata_quirk also defines the __ATA_QUIRK_MAX value as one plus the
last quirk flag defined. This value is used in ata_dev_quirks() to add a
build time check that all quirk flags fit within the unsigned int
(32-bits) quirks field of struct ata_device.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
According to Wiktionary, the verb "hork" is computing slang defined as
"To foul up; to be occupied with difficulty, tangle, or unpleasantness;
to be broken" (https://en.wiktionary.org/wiki/hork#Verb). libata uses
this with the term "horkage" to refer to broken device features. Given
that this term is not widely used and its meaning unknown to many,
rename it to the more commonly used term "quirk", similar to many other
places in the kernel.
The renaming done is:
1) Rename all ATA_HORKAGE_XXX flags to ATA_QUIRK_XXX
2) Rename struct ata_device horkage field to quirks
3) Rename struct ata_blacklist_entry to struct ata_dev_quirks_entry. The
array of these structures defining quirks for known devices is
renamed __ata_dev_quirks.
4) The functions ata_dev_blacklisted() and ata_force_horkage() are
renamed to ata_dev_quirks() and ata_force_quirks() respectively.
5) All the force_horkage_xxx() macros are renamed to force_quirk_xxx()
And while at it, make sure that the type "unsigned int" is used
consistantly for quirk flags variables and data structure fields.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Reviewed-by: Igor Pylypiv <ipylypiv@google.com>
The ata_sas_port_alloc() wrapper mainly exists in order to export the
internal libata function which it wraps. The secondary reason is that
it initializes some ata_port struct members.
However, ata_sas_port_alloc() is only used in a single location,
sas_ata_init(), which already performs some ata_port struct member
initialization, so it does not make sense to spread this initialization
out over two separate locations.
Thus, remove the wrapper and instead export the libata function directly,
and move the libsas specific ata_port initialization to sas_ata_init(),
which already does some ata_port initialization.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-19-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
ap->local_port_no is simply ap->port_no + 1.
Since ap->local_port_no can be derived from ap->port_no, there is no need
for the ap->local_port_no struct member, so remove ap->local_port_no.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-16-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Commit f31871951b ("libata: separate out ata_host_alloc() and
ata_host_register()") added ata_host_alloc(), where the API allowed
a LLD to overallocate the number of ports supplied to ata_host_alloc(),
as long as the LLD decreased host->n_ports before calling
ata_host_register().
However, this functionally has never ever been used by a single LLD.
Because of the current API design, the assignment of ap->print_id is
deferred until registration time, which is bad, because that means that
the ata_port_*() print functions cannot be used by a LLD until after
registration time, which means that a LLD is forced to use a print
function that is non-port specific, even for a port specific error.
Remove the support for decreasing the number of ports, such that it will
be possible to assign ap->print_id earlier.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-14-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Remove unused function declaration for ata_scsi_detect().
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-13-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
The ata_sas_tport_add() and ata_sas_tport_delete() wrappers only exist in
order to export the internal libata functions which they wrap.
Remove the wrappers and instead export the libata functions directly.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240703184418.723066-12-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
libsas is currently not freeing all the struct ata_port struct members,
e.g. ncq_sense_buf for a driver supporting Command Duration Limits (CDL).
Add a function, ata_port_free(), that is used to free a ata_port,
including its struct members. It makes sense to keep the code related to
freeing a ata_port in its own function, which will also free all the
struct members of struct ata_port.
Fixes: 18bd7718b5 ("scsi: ata: libata: Handle completion of CDL commands using policy 0xD")
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20240629124210.181537-8-cassel@kernel.org
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Updates to the usual drivers (ufs, lpfc, qla2xxx, mpi3mr, libsas).
The major update (which causes a conflict with block, see below) is
Christoph removing the queue limits and their associated block
helpers. The remaining patches are assorted minor fixes and
deprecated function updates plus a bit of constification.
Signed-off-by: James E.J. Bottomley <James.Bottomley@HansenPartnership.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI updates from James Bottomley:
"Updates to the usual drivers (ufs, lpfc, qla2xxx, mpi3mr, libsas).
The major update (which causes a conflict with block, see below) is
Christoph removing the queue limits and their associated block
helpers.
The remaining patches are assorted minor fixes and deprecated function
updates plus a bit of constification"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (141 commits)
scsi: mpi3mr: Sanitise num_phys
scsi: lpfc: Copyright updates for 14.4.0.2 patches
scsi: lpfc: Update lpfc version to 14.4.0.2
scsi: lpfc: Add support for 32 byte CDBs
scsi: lpfc: Change lpfc_hba hba_flag member into a bitmask
scsi: lpfc: Introduce rrq_list_lock to protect active_rrq_list
scsi: lpfc: Clear deferred RSCN processing flag when driver is unloading
scsi: lpfc: Update logging of protection type for T10 DIF I/O
scsi: lpfc: Change default logging level for unsolicited CT MIB commands
scsi: target: Remove unused list 'device_list'
scsi: iscsi: Remove unused list 'connlist_err'
scsi: ufs: exynos: Add support for Tensor gs101 SoC
scsi: ufs: exynos: Add some pa_dbg_ register offsets into drvdata
scsi: ufs: exynos: Allow max frequencies up to 267Mhz
scsi: ufs: exynos: Add EXYNOS_UFS_OPT_TIMER_TICK_SELECT option
scsi: ufs: exynos: Add EXYNOS_UFS_OPT_UFSPR_SECURE option
scsi: ufs: dt-bindings: exynos: Add gs101 compatible
scsi: qla2xxx: Fix debugfs output for fw_resource_count
scsi: qedf: Ensure the copied buf is NUL terminated
scsi: bfa: Ensure the copied buf is NUL terminated
...
Switch to the ->device_configure method instead of ->slave_configure and
update the block limits on the passed in queue_limits instead of using the
per-limit accessors.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240409143748.980206-21-hch@lst.de
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Export libata NCQ Priority configuration helpers to be reused for libsas
managed SATA devices.
Switched locking from spin_lock_irq() to spin_lock_irqsave(). In the
future someone might call these helper functions when interrupts are
disabled. spin_unlock_irq() could lead to a premature re-enabling of
interrupts, whereas spin_unlock_irqrestore() restores the interrupt state
to its condition prior to the spin_lock_irqsave() call.
Acked-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Link: https://lore.kernel.org/r/20240307214418.3812290-2-ipylypiv@google.com
Reviewed-by: Niklas Cassel <cassel@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Commit 3cc2ffe5c1 ("scsi: sd: Differentiate system and runtime start/stop
management") introduced the manage_system_start_stop scsi_device flag to
allow libata to indicate to the SCSI disk driver that nothing should be
done when resuming a disk on system resume. This change turned the
execution of sd_resume() into a no-op for ATA devices on system
resume. While this solved deadlock issues during device resume, this change
also wrongly removed the execution of opal_unlock_from_suspend(). As a
result, devices with TCG OPAL locking enabled remain locked and
inaccessible after a system resume from sleep.
To fix this issue, introduce the SCSI driver resume method and implement it
with the sd_resume() function calling opal_unlock_from_suspend(). The
former sd_resume() function is renamed to sd_resume_common() and modified
to call the new sd_resume() function. For non-ATA devices, this result in
no functional changes.
In order for libata to explicitly execute sd_resume() when a device is
resumed during system restart, the function scsi_resume_device() is
introduced. libata calls this function from the revalidation work executed
on devie resume, a state that is indicated with the new device flag
ATA_DFLAG_RESUMING. Doing so, locked TCG OPAL enabled devices are unlocked
on resume, allowing normal operation.
Fixes: 3cc2ffe5c1 ("scsi: sd: Differentiate system and runtime start/stop management")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=218538
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Link: https://lore.kernel.org/r/20240319071209.1179257-1-dlemoal@kernel.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Currently, both ATA_LPM_UNKNOWN (0) and ATA_LPM_MAX_POWER (1) displays
as "max_performance" in sysfs.
This is quite misleading as they are not the same.
For ATA_LPM_UNKNOWN, ata_eh_set_lpm() will not be called at all,
leaving the configuration in unknown state.
For ATA_LPM_MAX_POWER, ata_eh_set_lpm() is called, and setting the
policy to ATA_LPM_MAX_POWER.
This also matches the description of the SATA_MOBILE_LPM_POLICY Kconfig:
0 => Keep firmware settings
1 => Maximum performance
Thus, update the sysfs description for ATA_LPM_UNKNOWN to match reality.
While at it, update libata.h to mention that the ascii descriptions
are in libata-sata.c and not in libata-scsi.c.
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Niklas Cassel <cassel@kernel.org>
Simplify the inline DMA helper functions ata_using_mwdma(),
ata_using_udma() and ata_dma_enabled() to directly return as a boolean
the result of their test condition.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Chia-Lin Kao (AceLan) <acelan.kao@canonical.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct ata_cpr_log.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Damien Le Moal <dlemoal@kernel.org>
Cc: linux-ide@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
The target LPM policy can be set using either a Kconfig or a kernel module
parameter.
However, if the board type is set to anything but board_ahci_low_power,
then the LPM policy will overridden and set to ATA_LPM_UNKNOWN.
Additionally, if the default suspend is suspend to idle, depending on the
hardware capabilities of the HBA, ahci_update_initial_lpm_policy() might
override the LPM policy to either ATA_LPM_MIN_POWER_WITH_PARTIAL or
ATA_LPM_MIN_POWER.
All this means that it is very hard to know which LPM policy a user will
actually be using on a given system.
In order to make it easier to debug LPM related issues, print the LPM
policy on boot.
One common LPM related issue is that the device fails to link up.
Because of that, we cannot add this print to ata_dev_configure(), as that
function is only called after a successful link up. Instead, add the info
using ata_port_desc(), with the help of a new ata_port_desc_misc() helper.
The port description is printed once per port during boot.
Before changes:
ata1: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780100 irq 170
ata2: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780180 irq 170
After changes:
ata1: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780100 irq 170 lpm-pol 4
ata2: SATA max UDMA/133 abar m524288@0xa5780000 port 0xa5780180 irq 170 lpm-pol 4
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
The introduction of a device link to create a consumer/supplier
relationship between the scsi device of an ATA device and the ATA port
of that ATA device fixes the ordering of system suspend and resume
operations. For suspend, the scsi device is suspended first and the ata
port after it. This is fine as this allows the synchronize cache and
START STOP UNIT commands issued by the scsi disk driver to be executed
before the ata port is disabled.
For resume operations, the ata port is resumed first, followed
by the scsi device. This allows having the request queue of the scsi
device to be unfrozen after the ata port resume is scheduled in EH,
thus avoiding to see new requests prematurely issued to the ATA device.
Since libata sets manage_system_start_stop to 1, the scsi disk resume
operation also results in issuing a START STOP UNIT command to the
device being resumed so that the device exits standby power mode.
However, restoring the ATA device to the active power mode must be
synchronized with libata EH processing of the port resume operation to
avoid either 1) seeing the start stop unit command being received too
early when the port is not yet resumed and ready to accept commands, or
after the port resume process issues commands such as IDENTIFY to
revalidate the device. In this last case, the risk is that the device
revalidation fails with timeout errors as the drive is still spun down.
Commit 0a85890559 ("ata,scsi: do not issue START STOP UNIT on resume")
disabled issuing the START STOP UNIT command to avoid issues with it.
But this is incorrect as transitioning a device to the active power
mode from the standby power mode set on suspend requires a media access
command. The IDENTIFY, READ LOG and SET FEATURES commands executed in
libata EH context triggered by the ata port resume operation may thus
fail.
Fix these synchronization issues is by handling a device power mode
transitions for system suspend and resume directly in libata EH context,
without relying on the scsi disk driver management triggered with the
manage_system_start_stop flag.
To do this, the following libata helper functions are introduced:
1) ata_dev_power_set_standby():
This function issues a STANDBY IMMEDIATE command to transitiom a device
to the standby power mode. For HDDs, this spins down the disks. This
function applies only to ATA and ZAC devices and does nothing otherwise.
This function also does nothing for devices that have the
ATA_FLAG_NO_POWEROFF_SPINDOWN or ATA_FLAG_NO_HIBERNATE_SPINDOWN flag
set.
For suspend, call ata_dev_power_set_standby() in
ata_eh_handle_port_suspend() before the port is disabled and frozen.
ata_eh_unload() is also modified to transition all enabled devices to
the standby power mode when the system is shutdown or devices removed.
2) ata_dev_power_set_active() and
This function applies to ATA or ZAC devices and issues a VERIFY command
for 1 sector at LBA 0 to transition the device to the active power mode.
For HDDs, since this function will complete only once the disk spin up.
Its execution uses the same timeouts as for reset, to give the drive
enough time to complete spinup without triggering a command timeout.
For resume, call ata_dev_power_set_active() in
ata_eh_revalidate_and_attach() after the port has been enabled and
before any other command is issued to the device.
With these changes, the manage_system_start_stop and no_start_on_resume
scsi device flags do not need to be set in ata_scsi_dev_config(). The
flag manage_runtime_start_stop is still set to allow the sd driver to
spinup/spindown a disk through the sd runtime operations.
Fixes: 0a85890559 ("ata,scsi: do not issue START STOP UNIT on resume")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
There is no direct device ancestry defined between an ata_device and
its scsi device which prevents the power management code from correctly
ordering suspend and resume operations. Create such ancestry with the
ata device as the parent to ensure that the scsi device (child) is
suspended before the ata device and that resume handles the ata device
before the scsi device.
The parent-child (supplier-consumer) relationship is established between
the ata_port (parent) and the scsi device (child) with the function
device_add_link(). The parent used is not the ata_device as the PM
operations are defined per port and the status of all devices connected
through that port is controlled from the port operations.
The device link is established with the new function
ata_scsi_slave_alloc(), and this function is used to define the
->slave_alloc callback of the scsi host template of all ata drivers.
Fixes: a19a93e4c6 ("scsi: core: pm: Rely on the device driver core for async power management")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
On certain SATA controllers, softreset fails after wakeup from S2RAM with
the message "softreset failed (1st FIS failed)", sometimes resulting in
drives not being detected again. With the increased timeout, this issue
is avoided. Instead, "softreset failed (device not ready)" is now
logged 1-2 times; this later failure seems to cause fewer problems
however, and the drives are detected reliably once they've spun up and
the probe is retried.
The issue was observed with the primary SATA controller of the QNAP
TS-453B, which is an "Intel Corporation Celeron/Pentium Silver Processor
SATA Controller [8086:31e3] (rev 06)" integrated in the Celeron J4125 CPU,
and the following drives:
- Seagate IronWolf ST12000VN0008
- Seagate IronWolf ST8000NE0004
The SATA controller seems to be more relevant to this issue than the
drives, as the same drives are always detected reliably on the secondary
SATA controller on the same board (an ASMedia 106x) without any "softreset
failed" errors even without the increased timeout.
Fixes: e7d3ef13d5 ("libata: change drive ready wait after hard reset to 5s")
Cc: stable@vger.kernel.org
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
In AHCI 1.3.1, the register description for CAP.SSC:
"When cleared to ‘0’, software must not allow the HBA to initiate
transitions to the Slumber state via agressive link power management nor
the PxCMD.ICC field in each port, and the PxSCTL.IPM field in each port
must be programmed to disallow device initiated Slumber requests."
In AHCI 1.3.1, the register description for CAP.PSC:
"When cleared to ‘0’, software must not allow the HBA to initiate
transitions to the Partial state via agressive link power management nor
the PxCMD.ICC field in each port, and the PxSCTL.IPM field in each port
must be programmed to disallow device initiated Partial requests."
Ensure that we always set the corresponding bits in PxSCTL.IPM, such that
a device is not allowed to initiate transitions to power states which are
unsupported by the HBA.
DevSleep is always initiated by the HBA, however, for completeness, set the
corresponding bit in PxSCTL.IPM such that agressive link power management
cannot transition to DevSleep if DevSleep is not supported.
sata_link_scr_lpm() is used by libahci, ata_piix and libata-pmp.
However, only libahci has the ability to read the CAP/CAP2 register to see
if these features are supported. Therefore, in order to not introduce any
regressions on ata_piix or libata-pmp, create flags that indicate that the
respective feature is NOT supported. This way, the behavior for ata_piix
and libata-pmp should remain unchanged.
This change is based on a patch originally submitted by Runa Guo-oc.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Fixes: 1152b2617a ("libata: implement sata_link_scr_lpm() and make ata_dev_set_feature() global")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Now that all libata drivers have migrated to use the error_handler
callback, remove the deprecated phy_reset and eng_timeout callbacks.
Also remove references to non-existent functions sata_phy_reset and
ata_qc_timeout from Documentation/driver-api/libata.rst.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Remove ata_bus_probe() as it is unused.
Also, remove references to ata_bus_probe and port_disable in
Documentation/driver-api/libata.rst, as neither exist anymore.
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
ata_sas_port_init() now only contains a single initialization.
Move this single initialization to ata_sas_port_alloc(), since:
1) ata_sas_port_alloc() already initializes some of the struct members.
2) ata_sas_port_alloc() is only used by libsas.
Suggested-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Rename __ata_port_probe() to ata_port_probe() and drop the wrapper
ata_sas_async_probe().
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Unused.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Is now a wrapper around kfree(), so call it directly.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
