[PATCH] parport: ieee1284: mark expected switch fall-through

From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
	Kees Cook <keescook@chromium.org>
Subject: [PATCH] parport: ieee1284: mark expected switch fall-through
Date: Tue, 12 Feb 2019 11:43:18 -0600	[thread overview]
Message-ID: <20190212174318.GA22735@embeddedor> (raw)

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

This patch fixes the following warning:

drivers/parport/ieee1284.c: In function ‘parport_read’:
drivers/parport/ieee1284.c:722:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) {
      ^
drivers/parport/ieee1284.c:726:2: note: here
  case IEEE1284_MODE_NIBBLE:
  ^~~~

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>
---
 drivers/parport/ieee1284.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/parport/ieee1284.c b/drivers/parport/ieee1284.c
index f12b9da69255..90fb73575495 100644
--- a/drivers/parport/ieee1284.c
+++ b/drivers/parport/ieee1284.c
@@ -722,7 +722,7 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
 		if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) {
 			return -EIO;
 		}
-		/* fall through to NIBBLE */
+		/* fall through - to NIBBLE */
 	case IEEE1284_MODE_NIBBLE:
 		DPRINTK (KERN_DEBUG "%s: Using nibble mode\n", port->name);
 		fn = port->ops->nibble_read_data;
-- 
2.20.1

