[IPSEC]: Fix esp_decap_data size verification in esp4.

Signed-off-by: Edgar E Iglesias <edgar@axis.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 053a883..eae84cc 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -478,7 +478,7 @@
 {
 	struct xfrm_decap_state decap;
 
-	if (sizeof(struct esp_decap_data)  <
+	if (sizeof(struct esp_decap_data)  >
 	    sizeof(decap.decap_data)) {
 		extern void decap_data_too_small(void);