| Message ID | 20220828222121.4951-2-mario.limonciello@amd.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add some extra debugging mechanisms for s0i3 | expand |
Hi Mario,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on linus/master v6.0-rc2 next-20220826]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Mario-Limonciello/Add-some-extra-debugging-mechanisms-for-s0i3/20220829-062334
base: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220829/202208290836.C3cKDij9-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/af6400b51370a2bc04906697aeec5a938e6ee446
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Mario-Limonciello/Add-some-extra-debugging-mechanisms-for-s0i3/20220829-062334
git checkout af6400b51370a2bc04906697aeec5a938e6ee446
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/acpi/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> drivers/acpi/x86/s2idle.c:489:6: warning: no previous prototype for 'acpi_s2idle_enter' [-Wmissing-prototypes]
489 | void acpi_s2idle_enter(void)
| ^~~~~~~~~~~~~~~~~
vim +/acpi_s2idle_enter +489 drivers/acpi/x86/s2idle.c
488
> 489 void acpi_s2idle_enter(void)
490 {
491 struct acpi_s2idle_dev_ops *handler;
492
493 if (!lps0_device_handle || sleep_no_lps0)
494 return;
495
496 list_for_each_entry(handler, &lps0_s2idle_devops_head, list_node) {
497 if (handler->enter)
498 handler->enter();
499 }
500 }
501
diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c index f9ac12b778e6..c984093a3657 100644 --- a/drivers/acpi/x86/s2idle.c +++ b/drivers/acpi/x86/s2idle.c @@ -486,6 +486,19 @@ int acpi_s2idle_prepare_late(void) return 0; } +void acpi_s2idle_enter(void) +{ + struct acpi_s2idle_dev_ops *handler; + + if (!lps0_device_handle || sleep_no_lps0) + return; + + list_for_each_entry(handler, &lps0_s2idle_devops_head, list_node) { + if (handler->enter) + handler->enter(); + } +} + void acpi_s2idle_restore_early(void) { struct acpi_s2idle_dev_ops *handler; @@ -527,6 +540,7 @@ static const struct platform_s2idle_ops acpi_s2idle_ops_lps0 = { .begin = acpi_s2idle_begin, .prepare = acpi_s2idle_prepare, .prepare_late = acpi_s2idle_prepare_late, + .enter = acpi_s2idle_enter, .wake = acpi_s2idle_wake, .restore_early = acpi_s2idle_restore_early, .restore = acpi_s2idle_restore, diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 6f64b2f3dc54..9df14b5a875c 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1076,6 +1076,7 @@ struct acpi_s2idle_dev_ops { struct list_head list_node; void (*prepare)(void); void (*restore)(void); + void (*enter)(void); }; int acpi_register_lps0_dev(struct acpi_s2idle_dev_ops *arg); void acpi_unregister_lps0_dev(struct acpi_s2idle_dev_ops *arg); diff --git a/include/linux/suspend.h b/include/linux/suspend.h index 70f2921e2e70..5a3fdca0a628 100644 --- a/include/linux/suspend.h +++ b/include/linux/suspend.h @@ -191,6 +191,7 @@ struct platform_s2idle_ops { int (*begin)(void); int (*prepare)(void); int (*prepare_late)(void); + void (*enter)(void); bool (*wake)(void); void (*restore_early)(void); void (*restore)(void); diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 827075944d28..0c08032d6b50 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -136,6 +136,9 @@ static void s2idle_loop(void) break; } + if (s2idle_ops && s2idle_ops->enter) + s2idle_ops->enter(); + s2idle_enter(); }
On some platforms it is found that Linux more aggressively enters s2idle than Windows enters Modern Standby and this uncovers some synchronization issues for the platform. To aid in debugging this class of problems in the future, add support for an extra optional callback intended for drivers to emit extra debugging. Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> --- drivers/acpi/x86/s2idle.c | 14 ++++++++++++++ include/linux/acpi.h | 1 + include/linux/suspend.h | 1 + kernel/power/suspend.c | 3 +++ 4 files changed, 19 insertions(+)