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Since commit e2ffcda16290 ("ACPI: OSL: Allow Notify () handlers to run
on all CPUs"), the ACPI core allows multiple notify calls to be active
at the same time. This means that two instances of quickstart_notify()
running at the same time can mess which each others input sequences.
Fix this by protecting the input sequence with a mutex.
Compile-tested only.
Fixes: afd66f2a739e ("platform/x86: Add ACPI quickstart button (PNP0C32) driver")
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240327214524.123935-1-W_Armin@gmx.de
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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There is a mix of a few improvements to the driver.
I have done this instead of review, so it can quickly be
folded into the original code (partially or fully).
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240327215208.649020-1-andy.shevchenko@gmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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This drivers supports the ACPI quickstart button device, which
is used to send manufacturer-specific events to userspace.
Since the meaning of those events is not standardized, userspace
has to use for example hwdb to decode them.
The driver itself is based on an earlier proposal, but contains
some improvements and uses the device wakeup API instead of a
custom sysfs file.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240131111641.4418-2-W_Armin@gmx.de
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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