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ARM: OMAP: dma: Mark expected switch fall-throughs

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Mark switch cases where we are expecting to fall through.

This patch fixes the following warnings:

arch/arm/plat-omap/dma.c: In function 'omap_set_dma_src_burst_mode':
arch/arm/plat-omap/dma.c:384:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (dma_omap2plus()) {
      ^
arch/arm/plat-omap/dma.c:393:2: note: here
  case OMAP_DMA_DATA_BURST_16:
  ^~~~
arch/arm/plat-omap/dma.c:394:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (dma_omap2plus()) {
      ^
arch/arm/plat-omap/dma.c:402:2: note: here
  default:
  ^~~~~~~
arch/arm/plat-omap/dma.c: In function 'omap_set_dma_dest_burst_mode':
arch/arm/plat-omap/dma.c:473:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (dma_omap2plus()) {
      ^
arch/arm/plat-omap/dma.c:481:2: note: here
  default:
  ^~~~~~~

Notice that, in this particular case, the code comment is
modified in accordance with what GCC is expecting to find.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
This commit is contained in:
Gustavo A. R. Silva 2019-07-28 18:19:41 -05:00
commit 3da6bd945b
1 changed files with 5 additions and 9 deletions
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14
arch/arm/plat-omap/dma.c
View file

@ -388,17 +388,15 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
/*
* not supported by current hardware on OMAP1
* w |= (0x03 << 7);
* fall through
*/
/* fall through */
case OMAP_DMA_DATA_BURST_16:
if (dma_omap2plus()) {
burst = 0x3;
break;
}
/*
* OMAP1 don't support burst 16
* fall through
*/
/* OMAP1 don't support burst 16 */
/* fall through */
default:
BUG();
}
@ -474,10 +472,8 @@ void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
burst = 0x3;
break;
}
/*
* OMAP1 don't support burst 16
* fall through
*/
/* OMAP1 don't support burst 16 */
/* fall through */
default:
printk(KERN_ERR "Invalid DMA burst mode\n");
BUG();