In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warning: drivers/input/serio/libps2.c: In function ‘ps2_handle_ack’: drivers/input/serio/libps2.c:407:6: warning: this statement may fall through [-Wimplicit-fallthrough=] if (ps2dev->flags & PS2_FLAG_NAK) { ^ drivers/input/serio/libps2.c:417:2: note: here case 0x00: ^~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx> --- drivers/input/serio/libps2.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c index e6a07e68d1ff..22b8e05aa36c 100644 --- a/drivers/input/serio/libps2.c +++ b/drivers/input/serio/libps2.c @@ -409,6 +409,7 @@ bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data) ps2dev->nak = PS2_RET_ERR; break; } + /* Fall through */ /* * Workaround for mice which don't ACK the Get ID command. -- 2.21.0