There is a possibility that lock will be left acquired. Consolidate error path under out_free_unlock label.
Reported-by: kbuild test robot <[email protected]> Reviewed-by: Benjamin Tissoires <[email protected]> Signed-off-by: Andy Shevchenko <[email protected]> --- In v2: - address Darren's comments - update tags (in particular put proper email of reporter) I dare to push this to testing ahead. If anyone has objections, tell me asap. drivers/platform/x86/surface3-wmi.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/platform/x86/surface3-wmi.c b/drivers/platform/x86/surface3-wmi.c index 5553b2b85e0a..cbf4d83a7271 100644 --- a/drivers/platform/x86/surface3-wmi.c +++ b/drivers/platform/x86/surface3-wmi.c @@ -60,10 +60,10 @@ 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 }; acpi_status status; union acpi_object *obj; - - struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; + int error = 0; mutex_lock(&s3_wmi_lock); status = wmi_query_block(guid, instance, &output); @@ -77,13 +77,14 @@ static int s3_wmi_query_block(const char *guid, int instance, int *ret) obj->type == ACPI_TYPE_BUFFER ? obj->buffer.length : 0); } - kfree(obj); - return -EINVAL; + error = -EINVAL; + goto out_free_unlock; } *ret = obj->integer.value; + out_free_unlock: kfree(obj); mutex_unlock(&s3_wmi_lock); - return 0; + return error; } static inline int s3_wmi_query_lid(int *ret) -- 2.11.0
