iwlwifi: use kmemdup instead of kmalloc+memcpy

Signed-off-by: Andrei Epure <epure.andrei@gmail.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-test.c b/drivers/net/wireless/iwlwifi/iwl-test.c
index efff298..5cfd55b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-test.c
+++ b/drivers/net/wireless/iwlwifi/iwl-test.c
@@ -272,7 +272,7 @@
 
 	reply_len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
 	skb = iwl_test_alloc_reply(tst, reply_len + 20);
-	reply_buf = kmalloc(reply_len, GFP_KERNEL);
+	reply_buf = kmemdup(&pkt->hdr, reply_len, GFP_KERNEL);
 	if (!skb || !reply_buf) {
 		kfree_skb(skb);
 		kfree(reply_buf);
@@ -280,7 +280,6 @@
 	}
 
 	/* The reply is in a page, that we cannot send to user space. */
-	memcpy(reply_buf, &(pkt->hdr), reply_len);
 	iwl_free_resp(&cmd);
 
 	if (nla_put_u32(skb, IWL_TM_ATTR_COMMAND,