IB/srp: Fix memory leak in options parsing

Fix memory leak if parsing destination GID fails.

Coverity bug 1042
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/ulp/srp/ib_srp.c

@@ -1434,6 +1434,7 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
 			p = match_strdup(args);
 			if (strlen(p) != 32) {
 				printk(KERN_WARNING PFX "bad dest GID parameter '%s'\n", p);
+				kfree(p);
 				goto out;
 			}