linux-kernel - [PATCH] dmaengine: fsldma: Mark expected switch fall-through

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Message-ID: <20190812002159.GA26899@embeddedor>
Date:   Sun, 11 Aug 2019 19:22:00 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Li Yang <leoyang.li@....com>, Zhang Wei <zw@...kernel.org>,
        Vinod Koul <vkoul@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>
Cc:     linuxppc-dev@...ts.ozlabs.org, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] dmaengine: fsldma: Mark expected switch fall-through

Mark switch cases where we are expecting to fall through.

Fix the following warning (Building: powerpc-ppa8548_defconfig powerpc):

drivers/dma/fsldma.c: In function ‘fsl_dma_chan_probe’:
drivers/dma/fsldma.c:1165:26: warning: this statement may fall through [-Wimplicit-fallthrough=]
   chan->toggle_ext_pause = fsl_chan_toggle_ext_pause;
   ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/dma/fsldma.c:1166:2: note: here
  case FSL_DMA_IP_83XX:
  ^~~~

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/dma/fsldma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 23e0a356f167..ad72b3f42ffa 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -1163,6 +1163,7 @@ static int fsl_dma_chan_probe(struct fsldma_device *fdev,
 	switch (chan->feature & FSL_DMA_IP_MASK) {
 	case FSL_DMA_IP_85XX:
 		chan->toggle_ext_pause = fsl_chan_toggle_ext_pause;
+		/* Fall through */
 	case FSL_DMA_IP_83XX:
 		chan->toggle_ext_start = fsl_chan_toggle_ext_start;
 		chan->set_src_loop_size = fsl_chan_set_src_loop_size;
-- 
2.22.0