1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
index 48efb446258c..6505774f223e 100644
--- a/drivers/acpi/acpica/utxface.c
+++ b/drivers/acpi/acpica/utxface.c
@@ -287,7 +287,10 @@ acpi_status acpi_install_interface(acpi_string interface_name)
                 return (AE_BAD_PARAMETER);
         }
 
-        (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        if (ACPI_FAILURE(status)) {
+                return (status);
+        }
 
         /* Check if the interface name is already in the global list */
 
@@ -336,7 +339,10 @@ acpi_status acpi_remove_interface(acpi_string interface_name)
                 return (AE_BAD_PARAMETER);
         }
 
-        (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        if (ACPI_FAILURE(status)) {
+                return (status);
+        }
 
         status = acpi_ut_remove_interface(interface_name);
 
@@ -362,9 +368,12 @@ ACPI_EXPORT_SYMBOL(acpi_remove_interface)
  ****************************************************************************/
 acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
 {
-        acpi_status status = AE_OK;
+        acpi_status status;
 
-        (void)acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+        if (ACPI_FAILURE(status)) {
+                return (status);
+        }
 
         if (handler && acpi_gbl_interface_handler) {
                 status = AE_ALREADY_EXISTS;