On Sun, Sep 27, 2015 at 12:04 AM, Viresh Kumar viresh.kumar@linaro.org wrote:
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
Greg, please take this one along with the [2/2] if that one looks good to you.
BCC'd a lot of people (rather than cc'ing them) to make sure
- the series reaches them
- mailing lists do not block the patchset due to long cc list
- and we don't spam the BCC'd people for every reply
V4->V5:
- Switch back to the original solution of making global_lock u32.
drivers/acpi/ec_sys.c | 2 +- drivers/acpi/internal.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/acpi/ec_sys.c b/drivers/acpi/ec_sys.c index b4c216bab22b..bea8e425a8de 100644 --- a/drivers/acpi/ec_sys.c +++ b/drivers/acpi/ec_sys.c @@ -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)diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 9e426210c2a8..9db196de003c 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -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;-- 2.4.0
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