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ACPI EC: Fix regression due to use of uninitialized variable 

breakage introduced by following patch
commit 27663c5855
Author: Matthew Wilcox <willy@linux.intel.com>
Date:   Fri Oct 10 02:22:59 2008 -0400

acpi_evaluate_integer() does not clear passed variable if
there is an error at evaluation.
So if we ignore error, we must supply initialized variable.

http://bugzilla.kernel.org/show_bug.cgi?id=11917

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Alexey Starikovskiy 2008-11-03 14:26:40 -05:00 committed by Len Brown
parent 457d2ee225
commit d21cf3c16b
1 changed files with 2 additions and 1 deletions
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3
drivers/acpi/ec.c
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@ -736,7 +736,7 @@ static acpi_status
ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
{
acpi_status status;
unsigned long long tmp;
unsigned long long tmp = 0;
struct acpi_ec *ec = context;
status = acpi_walk_resources(handle, METHOD_NAME__CRS,
@ -751,6 +751,7 @@ ec_parse_device(acpi_handle handle, u32 Level, void *context, void **retval)
return status;
ec->gpe = tmp;
/* Use the global lock for all EC transactions? */
tmp = 0;
acpi_evaluate_integer(handle, "_GLK", NULL, &tmp);
ec->global_lock = tmp;
ec->handle = handle;