crypto: spacc - Fix NULL vs IS_ERR() check in spacc_aead_fallback()

The crypto_alloc_aead() function doesn't return NULL pointers, it returns
error pointers.  Fix the error checking.

Fixes: 06af76b46c78 ("crypto: spacc - Add SPAcc aead support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/dwc-spacc/spacc_aead.c b/drivers/crypto/dwc-spacc/spacc_aead.c
index abf5971..7f6c488 100755 (executable)
--- a/drivers/crypto/dwc-spacc/spacc_aead.c
+++ b/drivers/crypto/dwc-spacc/spacc_aead.c
@@ -769,9 +769,9 @@ static int spacc_aead_fallback(struct aead_request *req,
        ctx->fb.aead = crypto_alloc_aead(aead_name, 0,
                                         CRYPTO_ALG_NEED_FALLBACK |
                                         CRYPTO_ALG_ASYNC);
-       if (!ctx->fb.aead) {
+       if (IS_ERR(ctx->fb.aead)) {
                pr_err("Spacc aead fallback tfm is NULL!\n");
-               return -EINVAL;
+               return PTR_ERR(ctx->fb.aead);
        }
 
        subreq = aead_request_alloc(ctx->fb.aead, GFP_KERNEL);