6.1-stable review patch. If anyone has any objections, please let me know.
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From: Maciej S. Szmigiero mail@maciej.szmigiero.name
commit dd410d784402c5775f66faf8b624e85e41c38aaf upstream.
Wakeup for IRQ1 should be disabled only in cases where i8042 had actually enabled it, otherwise "wake_depth" for this IRQ will try to drop below zero and there will be an unpleasant WARN() logged:
kernel: atkbd serio0: Disabling IRQ1 wakeup source to avoid platform firmware bug kernel: ------------[ cut here ]------------ kernel: Unbalanced IRQ 1 wake disable kernel: WARNING: CPU: 10 PID: 6431 at kernel/irq/manage.c:920 irq_set_irq_wake+0x147/0x1a0
The PMC driver uses DEFINE_SIMPLE_DEV_PM_OPS() to define its dev_pm_ops which sets amd_pmc_suspend_handler() to the .suspend, .freeze, and .poweroff handlers. i8042_pm_suspend(), however, is only set as the .suspend handler.
Fix the issue by call PMC suspend handler only from the same set of dev_pm_ops handlers as i8042_pm_suspend(), which currently means just the .suspend handler.
To reproduce this issue try hibernating (S4) the machine after a fresh boot without putting it into s2idle first.
Fixes: 8e60615e8932 ("platform/x86/amd: pmc: Disable IRQ1 wakeup for RN/CZN") Reviewed-by: Mario Limonciello mario.limonciello@amd.com Signed-off-by: Maciej S. Szmigiero mail@maciej.szmigiero.name Link: https://lore.kernel.org/r/c8f28c002ca3c66fbeeb850904a1f43118e17200.173618460... [ij: edited the commit message.] Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Signed-off-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Signed-off-by: Zhaoyang Li lizy04@hust.edu.cn Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/platform/x86/amd/pmc.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/platform/x86/amd/pmc.c +++ b/drivers/platform/x86/amd/pmc.c @@ -834,6 +834,10 @@ static int __maybe_unused amd_pmc_suspen { struct amd_pmc_dev *pdev = dev_get_drvdata(dev);
+ /* + * Must be called only from the same set of dev_pm_ops handlers + * as i8042_pm_suspend() is called: currently just from .suspend. + */ if (pdev->cpu_id == AMD_CPU_ID_CZN) { int rc = amd_pmc_czn_wa_irq1(pdev);
@@ -846,7 +850,9 @@ static int __maybe_unused amd_pmc_suspen return 0; }
-static SIMPLE_DEV_PM_OPS(amd_pmc_pm, amd_pmc_suspend_handler, NULL); +static const struct dev_pm_ops amd_pmc_pm = { + .suspend = amd_pmc_suspend_handler, +};
#endif