[IPSEC]: Fix crypto_alloc_comp error checking

The function crypto_alloc_comp returns an errno instead of NULL
to indicate error.  So it needs to be tested with IS_ERR.

This is based on a patch by Vicenç Beltran Querol.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index 85eb4798d8d2..0cd4056f9127 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -36,6 +36,7 @@
 #include <net/ipcomp.h>
 #include <asm/semaphore.h>
 #include <linux/crypto.h>
+#include <linux/err.h>
 #include <linux/pfkeyv2.h>
 #include <linux/random.h>
 #include <linux/percpu.h>
@@ -358,7 +359,7 @@ static struct crypto_comp **ipcomp6_alloc_tfms(const char *alg_name)
         for_each_possible_cpu(cpu) {
                 struct crypto_comp *tfm = crypto_alloc_comp(alg_name, 0,
                                                             CRYPTO_ALG_ASYNC);
-                if (!tfm)
+                if (IS_ERR(tfm))
                         goto error;
                 *per_cpu_ptr(tfms, cpu) = tfm;
         }