2019-07-30 16:39:28

by Anders Roxell

Subject: [PATCH v2] video: fbdev: Mark expected switch fall-through

Now that -Wimplicit-fallthrough is passed to GCC by default, the
following warnings shows up:

../drivers/video/fbdev/sh_mobile_lcdcfb.c: In function ‘sh_mobile_lcdc_channel_fb_init’:
../drivers/video/fbdev/sh_mobile_lcdcfb.c:2086:22: warning: this statement may fall
through [-Wimplicit-fallthrough=]
info->fix.ypanstep = 2;
~~~~~~~~~~~~~~~~~~~^~~
../drivers/video/fbdev/sh_mobile_lcdcfb.c:2087:2: note: here
case V4L2_PIX_FMT_NV16:
^~~~
../drivers/video/fbdev/sh_mobile_lcdcfb.c: In function ‘sh_mobile_lcdc_overlay_fb_init’:
../drivers/video/fbdev/sh_mobile_lcdcfb.c:1596:22: warning: this statement may fall
through [-Wimplicit-fallthrough=]
info->fix.ypanstep = 2;
~~~~~~~~~~~~~~~~~~~^~~
../drivers/video/fbdev/sh_mobile_lcdcfb.c:1597:2: note: here
case V4L2_PIX_FMT_NV16:
^~~~

Rework to address a warnings due to the enablement of
-Wimplicit-fallthrough.

Signed-off-by: Anders Roxell <[email protected]>
---
drivers/video/fbdev/sh_mobile_lcdcfb.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index ac0bcac9a865..c249763dbf0b 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -1594,6 +1594,7 @@ sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
info->fix.ypanstep = 2;
+ /* Fall through */
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
info->fix.xpanstep = 2;
@@ -2084,6 +2085,7 @@ sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
info->fix.ypanstep = 2;
+ /* Fall through */
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
info->fix.xpanstep = 2;
--
2.20.1

2019-08-19 14:05:26

by Bartlomiej Zolnierkiewicz

Subject: Re: [PATCH v2] video: fbdev: Mark expected switch fall-through

On 7/30/19 5:25 PM, Anders Roxell wrote:
> Now that -Wimplicit-fallthrough is passed to GCC by default, the
> following warnings shows up:
>
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c: In function ‘sh_mobile_lcdc_channel_fb_init’:
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c:2086:22: warning: this statement may fall
> through [-Wimplicit-fallthrough=]
> info->fix.ypanstep = 2;
> ~~~~~~~~~~~~~~~~~~~^~~
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c:2087:2: note: here
> case V4L2_PIX_FMT_NV16:
> ^~~~
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c: In function ‘sh_mobile_lcdc_overlay_fb_init’:
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c:1596:22: warning: this statement may fall
> through [-Wimplicit-fallthrough=]
> info->fix.ypanstep = 2;
> ~~~~~~~~~~~~~~~~~~~^~~
> ../drivers/video/fbdev/sh_mobile_lcdcfb.c:1597:2: note: here
> case V4L2_PIX_FMT_NV16:
> ^~~~
>
> Rework to address a warnings due to the enablement of
> -Wimplicit-fallthrough.
>
> Signed-off-by: Anders Roxell <[email protected]>

Patch queued for v5.4, thanks.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics