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

[Greg Kroah-Hartman]

From: Sam Ravnborg <sam@xxxxxxxxxxxx>

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@xxxxxxxxxxxx>
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Fixes: e41f1a989408 ("fbdev: Implement simple blanking in pseudocolor modes for vt8500lcdfb")
Cc: Alexey Charkov <alchark@xxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v2.6.38+
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20200412202143.GA26948@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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)