From: Pan Bian <bianpan2016@163.com>
To: Tom Lendacky <thomas.lendacky@amd.com>,
Gary Hook <gary.hook@amd.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
Pan Bian <bianpan2016@163.com>
Subject: crypto: ccp: use dma_mapping_error to check map error
Date: Tue, 8 Aug 2017 21:42:47 +0800 [thread overview]
Message-ID: <1502199767-2578-1-git-send-email-bianpan2016@163.com> (raw)
The return value of dma_map_single() should be checked by
dma_mapping_error(). However, in function ccp_init_dm_workarea(), its
return value is checked against NULL, which could result in failures.
Signed-off-by: Pan Bian <bianpan2016@163.com>
---
drivers/crypto/ccp/ccp-ops.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index c0dfdac..ca83d19 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -168,7 +168,7 @@ static int ccp_init_dm_workarea(struct ccp_dm_workarea *wa,
wa->dma.address = dma_map_single(wa->dev, wa->address, len,
dir);
- if (!wa->dma.address)
+ if (dma_mapping_error(wa->dev, wa->dma.address))
return -ENOMEM;
wa->dma.length = len;
--
1.9.1
next reply other threads:[~2017-08-08 13:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-08 13:42 Pan Bian [this message]
2017-08-08 15:26 ` crypto: ccp: use dma_mapping_error to check map error Gary R Hook
2017-08-17 9:00 ` Herbert Xu
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