Proxmox-Port/linux-loongson
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson synced 2025-08-30 21:52:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ata: libata: Print if port is external on boot

Browse Source 
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>
This commit is contained in:
Niklas Cassel 2025-05-12 10:44:00 +02:00 committed by Damien Le Moal
parent b8ed947538
commit 439d47608b
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/libata.h
View File

@ -1618,6 +1618,8 @@ static inline void ata_port_desc_misc(struct ata_port *ap, int irq)
{
ata_port_desc(ap, "irq %d", irq);
ata_port_desc(ap, "lpm-pol %d", ap->target_lpm_policy);
if (ap->pflags & ATA_PFLAG_EXTERNAL)
ata_port_desc(ap, "ext");
}
static inline bool ata_tag_internal(unsigned int tag)