From: Mathias Jeppsson <mathias.jeppsson@sonymobile.com>
Date: Fri, 6 Jul 2012 22:53:18 +0000 (+0200)
Subject: NFC: Fix empty HCI message list check
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1913e57cf9a7be4565c56a3fbfd85106919ea006;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

NFC: Fix empty HCI message list check

list_first_entry() will never return NULL. Instead use
list_for_each_entry_safe() to iterate through the list.

Signed-off-by: Mathias Jeppsson <mathias.jeppsson@sonymobile.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index e1a640d2b588..da6e039c8606 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -682,13 +682,12 @@ EXPORT_SYMBOL(nfc_hci_register_device);
 
 void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
 {
-	struct hci_msg *msg;
+	struct hci_msg *msg, *n;
 
 	skb_queue_purge(&hdev->rx_hcp_frags);
 	skb_queue_purge(&hdev->msg_rx_queue);
 
-	while ((msg = list_first_entry(&hdev->msg_tx_queue, struct hci_msg,
-				       msg_l)) != NULL) {
+	list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
 		list_del(&msg->msg_l);
 		skb_queue_purge(&msg->msg_frags);
 		kfree(msg);