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
To fix this call the PMC suspend handler only from the same set of
dev_pm_ops handlers as i8042_pm_suspend() is called, which currently means
just the ".suspend" handler.
Before this patch the driver used DEFINE_SIMPLE_DEV_PM_OPS() to define its
dev_pm_ops, which also called this handler on ".freeze" and ".poweroff".
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@xxxxxxx>
Signed-off-by: Maciej S. Szmigiero <mail@xxxxxxxxxxxxxxxxxxxxx>
---
Changes from v1:
* Reword the commit message slightly, as suggested by Ilpo.
* Add Mario's "Reviewed-by:" tag.
drivers/platform/x86/amd/pmc/pmc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/amd/pmc/pmc.c b/drivers/platform/x86/amd/pmc/pmc.c
index 26b878ee5191..a254debb9256 100644
--- a/drivers/platform/x86/amd/pmc/pmc.c
+++ b/drivers/platform/x86/amd/pmc/pmc.c
@@ -947,6 +947,10 @@ static int amd_pmc_suspend_handler(struct device *dev)
{
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->disable_8042_wakeup && !disable_workarounds) {
int rc = amd_pmc_wa_irq1(pdev);
@@ -959,7 +963,9 @@ static int amd_pmc_suspend_handler(struct device *dev)
return 0;
}
-static DEFINE_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,
+};
static const struct pci_device_id pmc_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, AMD_CPU_ID_PS) },
