linux-kernel - [PATCH][next] dmaengine: ti: edma: fix null dereference because of a typo in pointer name

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Message-Id: <20200226185921.351693-1-colin.king@canonical.com>
Date:   Wed, 26 Feb 2020 18:59:21 +0000
From:   Colin King <colin.king@...onical.com>
To:     Dan Williams <dan.j.williams@...el.com>,
        Vinod Koul <vkoul@...nel.org>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        dmaengine@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] dmaengine: ti: edma: fix null dereference because of a typo in pointer name

From: Colin Ian King <colin.king@...onical.com>

Currently there is a dereference of the null pointer m_ddev.  This appears
to be a typo on the pointer, I believe s_ddev should be used instead.
Fix this by using the correct pointer.

Addresses-Coverity: ("Explicit null dereferenced")
Fixes: eb0249d50153 ("dmaengine: ti: edma: Support for interleaved mem to mem transfer")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/dma/ti/edma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index 2b1fdd438e7f..c4a5c170c1f9 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -1992,7 +1992,7 @@ static void edma_dma_init(struct edma_cc *ecc, bool legacy_mode)
 			 "Legacy memcpy is enabled, things might not work\n");
 
 		dma_cap_set(DMA_MEMCPY, s_ddev->cap_mask);
-		dma_cap_set(DMA_INTERLEAVE, m_ddev->cap_mask);
+		dma_cap_set(DMA_INTERLEAVE, s_ddev->cap_mask);
 		s_ddev->device_prep_dma_memcpy = edma_prep_dma_memcpy;
 		s_ddev->device_prep_interleaved_dma = edma_prep_dma_interleaved;
 		s_ddev->directions = BIT(DMA_MEM_TO_MEM);
-- 
2.25.0