[CRYPTO]: crypto_free_tfm() callers no longer need to check for NULL

Since the patch to add a NULL short-circuit to crypto_free_tfm() went in,
there's no longer any need for callers of that function to check for NULL.
This patch removes the redundant NULL checks and also a few similar checks
for NULL before calls to kfree() that I ran into while doing the
crypto_free_tfm bits.

I've succesfuly compile tested this patch, and a kernel with the patch 
applied boots and runs just fine.

When I posted the patch to LKML (and other lists/people on Cc) it drew the
following comments :

 J. Bruce Fields commented
  "I've no problem with the auth_gss or nfsv4 bits.--b."

 Sridhar Samudrala said
  "sctp change looks fine."

 Herbert Xu signed off on the patch.

So, I guess this is ready to be dropped into -mm and eventually mainline.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 12 deletions

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 514c85b2631a..035ad2c9e1ba 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -263,10 +263,8 @@ static int ah_init_state(struct xfrm_state *x)
 
 error:
 	if (ahp) {
-		if (ahp->work_icv)
-			kfree(ahp->work_icv);
-		if (ahp->tfm)
-			crypto_free_tfm(ahp->tfm);
+		kfree(ahp->work_icv);
+		crypto_free_tfm(ahp->tfm);
 		kfree(ahp);
 	}
 	return -EINVAL;
@@ -279,14 +277,10 @@ static void ah_destroy(struct xfrm_state *x)
 	if (!ahp)
 		return;
 
-	if (ahp->work_icv) {
-		kfree(ahp->work_icv);
-		ahp->work_icv = NULL;
-	}
-	if (ahp->tfm) {
-		crypto_free_tfm(ahp->tfm);
-		ahp->tfm = NULL;
-	}
+	kfree(ahp->work_icv);
+	ahp->work_icv = NULL;
+	crypto_free_tfm(ahp->tfm);
+	ahp->tfm = NULL;
 	kfree(ahp);
 }