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tty/n_hdlc: 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/tty/n_hdlc.c: In function ‘n_hdlc_tty_ioctl’:
drivers/tty/n_hdlc.c:775:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
   switch (arg) {
   ^~~~~~
drivers/tty/n_hdlc.c:782:2: note: here
  default:
  ^~~~~~~

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
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2019-02-12 13:19:48 -06:00 committed by Greg Kroah-Hartman
parent 78d3820b9b
commit 361bf8a9d8
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/n_hdlc.c
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@ -777,7 +777,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
case TCOFLUSH: case TCOFLUSH:
flush_tx_queue(tty); flush_tx_queue(tty);
} }
/* fall through to default */ /* fall through - to default */
default: default:
error = n_tty_ioctl_helper(tty, file, cmd, arg); error = n_tty_ioctl_helper(tty, file, cmd, arg);