ata: mark expected switch fall-throughs

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

In cases where a "drop through" comment was already in place, I replaced
it  with a proper "fall through" comment, which is what GCC is expecting
to find.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 49b3745d2c1f..e070fe8267ff 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -3711,9 +3711,11 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
         case -ENODEV:
                 /* device missing or wrong IDENTIFY data, schedule probing */
                 ehc->i.probe_mask |= (1 << dev->devno);
+                /* fall through */
         case -EINVAL:
                 /* give it just one more chance */
                 ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1);
+                /* fall through */
         case -EIO:
                 if (ehc->tries[dev->devno] == 1) {
                         /* This is the last chance, better to slow