watchdog: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a fallthrough pseudo-keyword instead of letting the
code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

diff --git a/drivers/watchdog/machzwd.c b/drivers/watchdog/machzwd.c
index 743377c5b173536903c2446bcca0c92442f48509..73f2221f6222f72deabf40afba6bdf22367fefcf 100644 (file)
--- a/drivers/watchdog/machzwd.c
+++ b/drivers/watchdog/machzwd.c
@@ -174,6 +174,7 @@ static inline void zf_set_timer(unsigned short new, unsigned char n)
                fallthrough;
        case WD2:
                zf_writeb(COUNTER_2, new > 0xff ? 0xff : new);
+               fallthrough;
        default:
                return;
        }