One-element arrays as fake flex arrays are deprecated[1] as the kernel
has switched to C99 flexible-array members instead. This case, however,
has more complexity because it is a flexible array of flexible arrays
and this patch needs to be ready to enable the new compiler flag
-Wflex-array-member-not-at-end (coming in GCC-14) globally.
So, define a new struct type for the single reports:
struct report {
uint16_t size;
struct hostif_msg_hdr msg;
} __packed;
but without the payload (flex array) in it. And add this payload to the
"hostif_msg" structure. This way, in the "report_list" structure we can
declare a flex array of single reports which now do not contain another
flex array.
struct report_list {
[...]
struct report reports[];
} __packed;
Therefore, the "struct hostif_msg" is now made up of a header and a
payload. And the "struct report" uses only the "hostif_msg" header.
The perfect solution would be for the "report" structure to use the
whole "hostif_msg" structure but this is not possible due to nested
flexible arrays. Anyway, the end result is equivalent since this patch
does attempt to change the behaviour of the code.
Now as well, we have more clarity after the cast from the raw bytes to
the new structures. Refactor the code accordingly to use the new
structures.
Also, use "container_of()" whenever we need to retrieve a pointer to
the flexible structure, through which we can access the flexible array
if needed.
Link: https://www.kernel.org/doc/html/next/process/deprecated.html#zero-length-and-one-element-arrays [1]
Closes: https://github.com/KSPP/linux/issues/333
Signed-off-by: Erick Archer <erick.archer@outlook.com>
Link: https://lore.kernel.org/r/AS8PR02MB723760CB93942370E92F00638BF72@AS8PR02MB7237.eurprd02.prod.outlook.com
[kees: tweaked commit log and dropped struct_size() uses]
Signed-off-by: Kees Cook <kees@kernel.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
The double `like' is duplicated in the comment, remove one.
Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
ISH IPC driver uses asynchronous workqueue to do resume now, but there is
a potential timing issue: when child devices resume before bus driver, it
will cause child devices resume failed and cannot be recovered until
reboot. The current implementation in this case do wait for IPC to resume
but fail to accommodate for a case when there is no ISH reboot and soft
resume is taking time. This issue is apparent on Tiger Lake platform with
5.11.13 kernel when doing suspend to idle then resume(s0ix) test. To
resolve this issue, we change ISHTP HID client to use asynchronous resume
callback too. In the asynchronous resume callback, it waits for the ISHTP
resume done event, and then notify ISHTP HID client link ready.
Signed-off-by: Ye Xiang <xiang.ye@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Fixes the following W=1 kernel build warning(s):
drivers/hid/intel-ish-hid/ishtp/bus.c: In function ‘ishtp_trace_callback’:
drivers/hid/intel-ish-hid/ishtp/bus.c:876:29: warning: return type might be a candidate for a format attribute [-Wsuggest-attribute=format]
876 | return cl_device->ishtp_dev->print_log;
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Daniel Drubin <daniel.drubin@intel.com>
Cc: linux-input@vger.kernel.org
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Fixes the following W=1 kernel build warning(s):
In file included from drivers/hid/intel-ish-hid/ishtp-hid.c:11:
drivers/hid/intel-ish-hid/ishtp-hid.h:24:21: warning: ‘hid_ishtp_guid’ defined but not used [-Wunused-const-variable=]
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Jiri Kosina <jikos@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: Daniel Drubin <daniel.drubin@intel.com>
Cc: linux-input@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms and conditions of the gnu general public license
version 2 as published by the free software foundation this program
is distributed in the hope it will be useful but without any
warranty without even the implied warranty of merchantability or
fitness for a particular purpose see the gnu general public license
for more details
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 263 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Only include intel-ish-client-if.h, which has all interfaces required to
implment ISHTP client. There is no longer any direct field access from
core ISHTP only include files.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
ISH clients don't need to access any field of struct ishtp_cl_device. To
avoid this create an interface functions instead where it is required.
In the case of ishtp_cl_allocate(), modify the parameters so that the
clients don't have to dereference.
Clients can also use tracing, here a new interface is added to get the
common trace function pointer, instead of direct call.
The new interface functions defined in one external header file, named
intel-ish-client-if.h. This is the only header files all ISHTP clients
must include.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Raw interface is often used to update firmwares in HID devices.
We are enabling the interface to support in-field firmware update
for the HID devices attached to ISH.
Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
There are new types and helpers that are supposed to be used in new code.
As a preparation to get rid of legacy types and API functions do
the conversion here.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This driver is responsible for implementing ISH HID client, which
gets HID description and report. Once it has completely gets
report descriptors, it registers as a HID LL drivers. This implements
necessary callbacks so that it can be used by HID sensor hub driver.
Original-author: Daniel Drubin <daniel.drubin@intel.com>
Reviewed-and-tested-by: Ooi, Joyce <joyce.ooi@intel.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Rann Bar-On <rb6@duke.edu>
Tested-by: Atri Bhattacharya <badshah400@aim.com>
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
