1 files changed, 15 insertions, 2 deletions

diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c
index 5fdf251a9f97..01e1b3d63fc0 100644
--- a/drivers/acpi/acpica/tbinstal.c
+++ b/drivers/acpi/acpica/tbinstal.c
@@ -217,6 +217,10 @@ acpi_tb_install_standard_table(acpi_physical_address address,
                 goto release_and_exit;
         }
 
+        /* Acquire the table lock */
+
+        (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+
         if (reload) {
                 /*
                  * Validate the incoming table signature.
@@ -244,7 +248,7 @@ acpi_tb_install_standard_table(acpi_physical_address address,
                                          new_table_desc.signature.integer));
 
                         status = AE_BAD_SIGNATURE;
-                        goto release_and_exit;
+                        goto unlock_and_exit;
                 }
 
                 /* Check if table is already registered */
@@ -279,7 +283,7 @@ acpi_tb_install_standard_table(acpi_physical_address address,
                                 /* Table is still loaded, this is an error */
 
                                 status = AE_ALREADY_EXISTS;
-                                goto release_and_exit;
+                                goto unlock_and_exit;
                         } else {
                                 /*
                                  * Table was unloaded, allow it to be reloaded.
@@ -290,6 +294,7 @@ acpi_tb_install_standard_table(acpi_physical_address address,
                                  * indicate the re-installation.
                                  */
                                 acpi_tb_uninstall_table(&new_table_desc);
+                                (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
                                 *table_index = i;
                                 return_ACPI_STATUS(AE_OK);
                         }
@@ -303,11 +308,19 @@ acpi_tb_install_standard_table(acpi_physical_address address,
 
         /* Invoke table handler if present */
 
+        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
         if (acpi_gbl_table_handler) {
                 (void)acpi_gbl_table_handler(ACPI_TABLE_EVENT_INSTALL,
                                              new_table_desc.pointer,
                                              acpi_gbl_table_handler_context);
         }
+        (void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
+
+unlock_and_exit:
+
+        /* Release the table lock */
+
+        (void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
 
 release_and_exit: