From: Pan Bian <bianpan2016@163.com>
Date: Tue, 8 Aug 2017 13:42:47 +0000 (+0800)
Subject: crypto: ccp - use dma_mapping_error to check map error
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ef4064bb3f6a1037cbda8d025f564aab5bd2de35;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

crypto: ccp - use dma_mapping_error to check map error

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>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 804924e48c89..406b95329b3d 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;