linux-kernel - [PATCH 3/4] crypto: caamhash: add two missed dma_mapping

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Date:	Sat, 28 Feb 2015 14:00:33 +0800
From:	<yanjiang.jin@...driver.com>
To:	<herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC:	<horia.geanta@...escale.com>, <kim.phillips@...escale.com>,
	<ruchika.gupta@...escale.com>, <cristian.stoica@...escale.com>,
	<NiteshNarayanLal@...escale.com>, <jinyanjiang@...il.com>,
	<linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>
Subject: [PATCH 3/4] crypto: caamhash: add two missed dma_mapping_error

From: Yanjiang Jin <yanjiang.jin@...driver.com>

Add two missed dma_mapping_error() after dma_map_single().

Signed-off-by: Yanjiang Jin <yanjiang.jin@...driver.com>
---
 drivers/crypto/caam/caamhash.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index f347ab7..f6ad322 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -160,6 +160,10 @@ static inline dma_addr_t map_seq_out_ptr_result(u32 *desc, struct device *jrdev,
 	dma_addr_t dst_dma;
 
 	dst_dma = dma_map_single(jrdev, result, digestsize, DMA_FROM_DEVICE);
+	if (dma_mapping_error(jrdev, dst_dma)) {
+		dev_err(jrdev, "unable to map dst dma\n");
+		return -ENOMEM;
+	}
 	append_seq_out_ptr(desc, dst_dma, digestsize, 0);
 
 	return dst_dma;
@@ -173,6 +177,10 @@ static inline dma_addr_t buf_map_to_sec4_sg(struct device *jrdev,
 	dma_addr_t buf_dma;
 
 	buf_dma = dma_map_single(jrdev, buf, buflen, DMA_TO_DEVICE);
+	if (dma_mapping_error(jrdev, buf_dma)) {
+		dev_err(jrdev, "unable to map buf dma\n");
+		return 0;
+	}
 	dma_to_sec4_sg_one(sec4_sg, buf_dma, buflen, 0);
 
 	return buf_dma;
-- 
1.9.1

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