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* usb: isp1760-hcd: Fix fall-through annotations
@ 2019-05-01 15:39 Gustavo A. R. Silva
  2019-05-01 15:39 ` [PATCH] " Gustavo A. R. Silva
  2019-05-01 16:03 ` Greg Kroah-Hartman
  0 siblings, 2 replies; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-05-01 15:39 UTC (permalink / raw)
  To: Greg Kroah-Hartman, Arvid Brodin
  Cc: linux-usb, linux-kernel, Gustavo A. R. Silva

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

This patch fixes the following warning:

drivers/usb/isp1760/isp1760-hcd.c: In function ‘collect_qtds’:
drivers/usb/isp1760/isp1760-hcd.c:788:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
      mem_reads8(hcd->regs, qtd->payload_addr,
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        qtd->data_buffer,
        ~~~~~~~~~~~~~~~~~
        qtd->actual_length);
        ~~~~~~~~~~~~~~~~~~~
drivers/usb/isp1760/isp1760-hcd.c:792:5: note: here
     case OUT_PID:
     ^~~~

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

Notice that, in this particular case, the code comments are 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>
---
Notice that this code has been out there since 2011, and who
introduced the question mark was the original developer.

It'd be good if someone can confirm that the fall-through
has been intentional all this time.
	
Thanks
--
Gustavo

 drivers/usb/isp1760/isp1760-hcd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/isp1760/isp1760-hcd.c b/drivers/usb/isp1760/isp1760-hcd.c
index 8142c6b4c4cf..320fc4739835 100644
--- a/drivers/usb/isp1760/isp1760-hcd.c
+++ b/drivers/usb/isp1760/isp1760-hcd.c
@@ -788,11 +788,11 @@ static void collect_qtds(struct usb_hcd *hcd, struct isp1760_qh *qh,
 					mem_reads8(hcd->regs, qtd->payload_addr,
 							qtd->data_buffer,
 							qtd->actual_length);
-					/* Fall through (?) */
+					/* Fall through */
 				case OUT_PID:
 					qtd->urb->actual_length +=
 							qtd->actual_length;
-					/* Fall through ... */
+					/* Fall through */
 				case SETUP_PID:
 					break;
 				}

^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2019-05-01 16:13 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
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2019-05-01 15:39 usb: isp1760-hcd: Fix fall-through annotations Gustavo A. R. Silva
2019-05-01 15:39 ` [PATCH] " Gustavo A. R. Silva
2019-05-01 16:03 ` Greg Kroah-Hartman
2019-05-01 16:03   ` [PATCH] " Greg Kroah-Hartman
2019-05-01 16:13   ` Gustavo A. R. Silva
2019-05-01 16:13     ` [PATCH] " Gustavo A. R. Silva

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