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staging: lustre: fix return value check in capa_hmac() 

In case of error, the function crypto_alloc_hash() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Wei Yongjun 2013-12-20 11:41:11 +08:00 committed by Greg Kroah-Hartman
parent a3c383c5c3
commit b751bc77be
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/lustre/lustre/obdclass/capa.c
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@ -272,10 +272,10 @@ int capa_hmac(__u8 *hmac, struct lustre_capa *capa, __u8 *key)
alg = &capa_hmac_algs[capa_alg(capa)];
tfm = crypto_alloc_hash(alg->ha_name, 0, 0);
if (!tfm) {
if (IS_ERR(tfm)) {
CERROR("crypto_alloc_tfm failed, check whether your kernel"
"has crypto support!\n");
return -ENOMEM;
return PTR_ERR(tfm);
}
keylen = alg->ha_keylen;