linux-kernel - [PATCH 5.4 100/134] video: vt8500lcdfb: fix fallthrough warning

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Date:   Tue, 16 Jun 2020 17:34:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
        kbuild test robot <lkp@...el.com>,
        Alexey Charkov <alchark@...il.com>,
        Paul Mundt <lethal@...ux-sh.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: [PATCH 5.4 100/134] video: vt8500lcdfb: fix fallthrough warning

From: Sam Ravnborg <sam@...nborg.org>

commit 1c49f35e9e9156273124a0cfd38b57f7a7d4828f upstream.

Fix following warning:
vt8500lcdfb.c: In function 'vt8500lcd_blank':
vt8500lcdfb.c:229:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
      if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR ||
         ^
vt8500lcdfb.c:233:2: note: here
     case FB_BLANK_UNBLANK:
     ^~~~

Adding a simple "fallthrough;" fixed the warning.
The fix was build tested.

Signed-off-by: Sam Ravnborg <sam@...nborg.org>
Reported-by: kbuild test robot <lkp@...el.com>
Fixes: e41f1a989408 ("fbdev: Implement simple blanking in pseudocolor modes for vt8500lcdfb")
Cc: Alexey Charkov <alchark@...il.com>
Cc: Paul Mundt <lethal@...ux-sh.org>
Cc: <stable@...r.kernel.org> # v2.6.38+
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200412202143.GA26948@ravnborg.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/video/fbdev/vt8500lcdfb.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/video/fbdev/vt8500lcdfb.c
+++ b/drivers/video/fbdev/vt8500lcdfb.c
@@ -230,6 +230,7 @@ static int vt8500lcd_blank(int blank, st
 		    info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)
 			for (i = 0; i < 256; i++)
 				vt8500lcd_setcolreg(i, 0, 0, 0, 0, info);
+		fallthrough;
 	case FB_BLANK_UNBLANK:
 		if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 		    info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR)