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ACPI / EC: Fix broken 64bit big-endian users of 'global_lock' 

global_lock is defined as an unsigned long and accessing only its lower
32 bits from sysfs is incorrect, as we need to consider other 32 bits
for big endian 64-bit systems. There are no such platforms yet, but the
code needs to be robust for such a case.

Fix that by changing type of 'global_lock' to u32.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Viresh Kumar 2015-09-26 15:04:06 -07:00 committed by Greg Kroah-Hartman
parent 9ffecb1028
commit 6e58f752a6
2 changed files with 2 additions and 2 deletions
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2
drivers/acpi/ec_sys.c
View File

@ -128,7 +128,7 @@ static int acpi_ec_add_debugfs(struct acpi_ec *ec, unsigned int ec_device_count)
if (!debugfs_create_x32("gpe", 0444, dev_dir, (u32 *)&first_ec->gpe))
goto error;
if (!debugfs_create_bool("use_global_lock", 0444, dev_dir,
(u32 *)&first_ec->global_lock))
&first_ec->global_lock))
goto error;
if (write_support)

2
drivers/acpi/internal.h
View File

@ -138,7 +138,7 @@ struct acpi_ec {
unsigned long gpe;
unsigned long command_addr;
unsigned long data_addr;
unsigned long global_lock;
u32 global_lock;
unsigned long flags;
unsigned long reference_count;
struct mutex mutex;