linux-kernel - [PATCH v3 9/9] Staging: rts5208: Add missing dma_mapping

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Date:	Tue,  9 Feb 2016 18:45:28 -0800
From:	Shaun Ren <shaun.ren@...ux.com>
To:	gregkh@...uxfoundation.org, rjui@...adcom.com
Cc:	sbranden@...adcom.com, jonmason@...adcom.com,
	mahfouz.saif.elyazal@...il.com, joe@...ches.com,
	devel@...verdev.osuosl.org, linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com,
	linux-kernel@...r.kernel.org, Shaun Ren <shaun.ren@...ux.com>
Subject: [PATCH v3 9/9] Staging: rts5208: Add missing dma_mapping_error

This patch adds a dma_mapping_error call to debug potential DMA mapping
errors after the dma_map_single call in rtsx_transport.c.

Signed-off-by: Shaun Ren <shaun.ren@...ux.com>
---
 drivers/staging/rts5208/rtsx_transport.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rts5208/rtsx_transport.c b/drivers/staging/rts5208/rtsx_transport.c
index 46fc8c2..2b38de7 100644
--- a/drivers/staging/rts5208/rtsx_transport.c
+++ b/drivers/staging/rts5208/rtsx_transport.c
@@ -658,7 +658,7 @@ static int rtsx_transfer_buf(struct rtsx_chip *chip, u8 card, void *buf,
 		return -ENXIO;
 
 	addr = dma_map_single(&rtsx->pci->dev, buf, len, dma_dir);
-	if (!addr)
+	if (dma_mapping_error(&rtsx->pci->dev, addr))
 		return -ENOMEM;
 
 	if (card == SD_CARD)
-- 
2.7.0