This is a note to let you know that I've just added the patch titled
platform/x86: intel-hid: Fix spurious wakeups caused by tablet-mode events during suspend
to the 5.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
platform-x86-intel-hid-fix-spurious-wakeups-caused-b.patch
and it can be found in the queue-5.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a9822131a707ae064994dab7e3fc4b450440fc5a
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Sun Apr 4 16:38:31 2021 +0200
platform/x86: intel-hid: Fix spurious wakeups caused by tablet-mode events during suspend
[ Upstream commit a3790a8a94fc0234c5d38013b48e74ef221ec84c ]
Some devices send (duplicate) tablet-mode events when moved around even
though the mode has not changed; and they do this even when suspended.
Change the tablet-mode event handling when priv->wakeup_mode is set to
update the switch state in case it changed and then return immediately
(without calling pm_wakeup_hard_event()) to avoid spurious wakeups.
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=212537
Fixes: 537b0dd4729e ("platform/x86: intel-hid: Add support for SW_TABLET_MODE")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Reviewed-by: Elia Devito <eliadevito@xxxxxxxxx>
Link: https://lore.kernel.org/r/20210404143831.25173-1-hdegoede@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c
index 57cc92891a57..078648a9201b 100644
--- a/drivers/platform/x86/intel-hid.c
+++ b/drivers/platform/x86/intel-hid.c
@@ -483,11 +483,16 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
goto wakeup;
/*
- * Switch events will wake the device and report the new switch
- * position to the input subsystem.
+ * Some devices send (duplicate) tablet-mode events when moved
+ * around even though the mode has not changed; and they do this
+ * even when suspended.
+ * Update the switch state in case it changed and then return
+ * without waking up to avoid spurious wakeups.
*/
- if (priv->switches && (event == 0xcc || event == 0xcd))
- goto wakeup;
+ if (event == 0xcc || event == 0xcd) {
+ report_tablet_mode_event(priv->switches, event);
+ return;
+ }
/* Wake up on 5-button array events only. */
if (event == 0xc0 || !priv->array)
@@ -501,9 +506,6 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
wakeup:
pm_wakeup_hard_event(&device->dev);
- if (report_tablet_mode_event(priv->switches, event))
- return;
-
return;
}
