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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>
This commit is contained in:
Pan Bian 2017-08-08 21:42:47 +08:00 committed by Herbert Xu
parent dea632cadd
commit ef4064bb3f
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/ccp/ccp-ops.c
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@ -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;