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ACPI: EC: Fix ACPI EC resume non-query interrupt message

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When resuming from standby (on a laptop) I see the following message in
my kernel.log:
"ACPI: EC: non-query interrupt received, switching to interrupt mode"
This apparently prevented sony-laptop to properly restore the brightness
level on resume.

The cause: In drivers/acpi/ec.c the acpi_ec_suspend function clears the
GPE mode bit, but this is not restored in acpi_ec_resume (the function
below it). The patch below fixes this by properly restoring the GPE_MODE
bit. Tested and confirmed to work.

Signed-off-by: Almer S. Tigelaar <almer@gnome.org>
Signed-off-by: Mattia Dongili <malattia@linux.it>
Acked-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Almer S. Tigelaar 2009-04-12 11:26:29 +00:00 committed by Len Brown
parent a83021a229
commit 5aa63f038f
1 changed files with 1 additions and 0 deletions
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drivers/acpi/ec.c
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@ -1065,6 +1065,7 @@ static int acpi_ec_resume(struct acpi_device *device)
struct acpi_ec *ec = acpi_driver_data(device); struct acpi_ec *ec = acpi_driver_data(device);
/* Enable use of GPE back */ /* Enable use of GPE back */
clear_bit(EC_FLAGS_NO_GPE, &ec->flags); clear_bit(EC_FLAGS_NO_GPE, &ec->flags);
set_bit(EC_FLAGS_GPE_MODE, &ec->flags);
acpi_enable_gpe(NULL, ec->gpe); acpi_enable_gpe(NULL, ec->gpe);
return 0; return 0;
} }