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crypto: amcc - check return value of sg_nents_for_len

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The sg_nents_for_len() function could fail, this patch add a check for
its return value.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
LABBE Corentin 2015-11-04 21:13:39 +01:00 committed by Herbert Xu
parent f9970c2865
commit 7aff7d0abc
1 changed files with 4 additions and 0 deletions
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4
drivers/crypto/amcc/crypto4xx_core.c
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@ -781,6 +781,10 @@ u32 crypto4xx_build_pd(struct crypto_async_request *req,
/* figure how many gd is needed */
num_gd = sg_nents_for_len(src, datalen);
if ((int)num_gd < 0) {
dev_err(dev->core_dev->device, "Invalid number of src SG.\n");
return -EINVAL;
}
if (num_gd == 1)
num_gd = 0;