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platform/surface: surface3-wmi: Fix variable 'status' set but not used compiler warning 

Explicitly check the status rather then relying on output.pointer staying
NULL on an error. This silences the following compiler warning:

drivers/platform/surface/surface3-wmi.c:60:14: warning: variable 'status' set but not used [-Wunused-but-set-variable]

Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210204113848.105994-1-hdegoede@redhat.com
This commit is contained in:
Hans de Goede 2021-02-04 12:38:48 +01:00
parent f1e1ea5167
commit f807f4b7b3
1 changed files with 5 additions and 1 deletions
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6
drivers/platform/surface/surface3-wmi.c
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@ -57,12 +57,16 @@ static DEFINE_MUTEX(s3_wmi_lock);
static int s3_wmi_query_block(const char *guid, int instance, int *ret)
{
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj = NULL;
acpi_status status;
union acpi_object *obj;
int error = 0;
mutex_lock(&s3_wmi_lock);
status = wmi_query_block(guid, instance, &output);
if (ACPI_FAILURE(status)) {
error = -EIO;
goto out_free_unlock;
}
obj = output.pointer;