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Date:   Mon, 11 Feb 2019 16:34:44 -0600
From:   "Gustavo A. R. Silva" <>
To:     Paul Bolle <>, Karsten Keil <>
        "Gustavo A. R. Silva" <>,
        Kees Cook <>
Subject: [PATCH] ser_gigaset: mark expected switch fall-through

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

This patch fixes the following warning:

drivers/isdn/gigaset/ser-gigaset.c: In function ‘gigaset_tty_ioctl’:
drivers/isdn/gigaset/ser-gigaset.c:627:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   switch (arg) {
drivers/isdn/gigaset/ser-gigaset.c:638:2: note: here

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable

Signed-off-by: Gustavo A. R. Silva <>
 drivers/isdn/gigaset/ser-gigaset.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c
index ab0b63a4d045..e1de8b1a1001 100644
--- a/drivers/isdn/gigaset/ser-gigaset.c
+++ b/drivers/isdn/gigaset/ser-gigaset.c
@@ -633,7 +633,7 @@ gigaset_tty_ioctl(struct tty_struct *tty, struct file *file,
-		/* Pass through */
+		/* fall through */
 		/* pass through to underlying serial device */

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