From mboxrd@z Thu Jan 1 00:00:00 1970 From: peter.griffin@linaro.org (Peter Griffin) Date: Tue, 7 Jun 2016 18:38:36 +0100 Subject: [PATCH 3/8] dmaengine: coh901318: Only calculate residue if txstate exists. In-Reply-To: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> References: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> Message-ID: <1465321121-22238-4-git-send-email-peter.griffin@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org There is no point in calculating the residue if there is no txstate to store the value. Signed-off-by: Peter Griffin --- drivers/dma/coh901318.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index c340ca9..c100616 100644 --- a/drivers/dma/coh901318.c +++ b/drivers/dma/coh901318.c @@ -2422,7 +2422,7 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie, enum dma_status ret; ret = dma_cookie_status(chan, cookie, txstate); - if (ret == DMA_COMPLETE) + if (ret == DMA_COMPLETE || !txstate) return ret; dma_set_residue(txstate, coh901318_get_bytes_left(chan)); -- 1.9.1