ACPI: ec: add unlock in error path

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 743ce27fa0bb..8f5aaf753fda 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -280,8 +280,10 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
         mutex_lock(&ec->lock);
         if (ec->global_lock) {
                 status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
-                if (ACPI_FAILURE(status))
+                if (ACPI_FAILURE(status)) {
+                        mutex_unlock(&ec->lock);
                         return -ENODEV;
+                }
         }
 
         /* Make sure GPE is enabled before doing transaction */