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Commit d9a6c8f5 authored by Vinod Koul's avatar Vinod Koul
Browse files

dmaengine: fix - error: potential NULL dereference 'chan' 



commit 7bb587f4 "dmaengine: add interface of dma_get_slave_channel" introduced
the above error so fix it

Reported-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Suggested-by: default avatarZhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@intel.com>
parent 7bb587f4

drivers/dma/dmaengine.c

+5 −5
Original line number Diff line number Diff line
@@ -514,16 +514,16 @@ struct dma_chan *dma_get_slave_channel(struct dma_chan *chan) 
	/* lock against __dma_request_channel */

	mutex_lock(&dma_list_mutex);



	if (chan->client_count == 0)

	if (chan->client_count == 0) {

		err = dma_chan_get(chan);

	else

		if (err)

			pr_debug("%s: failed to get %s: (%d)\n",

				__func__, dma_chan_name(chan), err);

	} else

		chan = NULL;



	mutex_unlock(&dma_list_mutex);



	if (err)

		pr_debug("%s: failed to get %s: (%d)\n",

			__func__, dma_chan_name(chan), err);



	return chan;

}