ACPI: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

4 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 8f52483219ba..47a7ed557bd6 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -265,6 +265,7 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
         default:
                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
                                   "Unsupported event [0x%x]\n", event));
+        /* fall through */
         case ACPI_AC_NOTIFY_STATUS:
         case ACPI_NOTIFY_BUS_CHECK:
         case ACPI_NOTIFY_DEVICE_CHECK:
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index 86c10599d9f8..449d86d39965 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -82,6 +82,7 @@ static int acpi_processor_errata_piix4(struct pci_dev *dev)
                  * PIIX4 models.
                  */
                 errata.piix4.throttle = 1;
+                /* fall through*/
 
         case 2:         /* PIIX4E */
         case 3:         /* PIIX4M */
diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 2305e1ab978e..e3fc1f045e1c 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -482,6 +482,7 @@ int dock_notify(struct acpi_device *adev, u32 event)
                 surprise_removal = 1;
                 event = ACPI_NOTIFY_EJECT_REQUEST;
                 /* Fall back */
+                /* fall through */
         case ACPI_NOTIFY_EJECT_REQUEST:
                 begin_undock(ds);
                 if ((immediate_undock && !(ds->flags & DOCK_IS_ATA))
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index d85e010ee2cc..316a0fc785e3 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -381,6 +381,7 @@ unsigned int acpi_dev_get_irq_type(int triggering, int polarity)
         case ACPI_ACTIVE_BOTH:
                 if (triggering == ACPI_EDGE_SENSITIVE)
                         return IRQ_TYPE_EDGE_BOTH;
+                /* fall through */
         default:
                 return IRQ_TYPE_NONE;
         }