linux-kernel - [PATCH v2] wifi: wl1251: fix memory leak in wl1251_tx

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Message-ID: <20250330104532.44935-1-abdun.nihaal@gmail.com>
Date: Sun, 30 Mar 2025 16:15:32 +0530
From: Abdun Nihaal <abdun.nihaal@...il.com>
To: kvalo@...nel.org
Cc: abdun.nihaal@...il.com,
	linville@...driver.com,
	linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] wifi: wl1251: fix memory leak in wl1251_tx_work

The skb dequeued from tx_queue is lost when wl1251_ps_elp_wakeup fails
with a -ETIMEDOUT error. Fix that by queueing the skb back to tx_queue.

Fixes: c5483b719363 ("wl12xx: check if elp wakeup failed")
Signed-off-by: Abdun Nihaal <abdun.nihaal@...il.com>
---
V1 -> V2 : Add subsystem name in commit header message

 drivers/net/wireless/ti/wl1251/tx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ti/wl1251/tx.c b/drivers/net/wireless/ti/wl1251/tx.c
index 474b603c121c..adb4840b0489 100644
--- a/drivers/net/wireless/ti/wl1251/tx.c
+++ b/drivers/net/wireless/ti/wl1251/tx.c
@@ -342,8 +342,10 @@ void wl1251_tx_work(struct work_struct *work)
 	while ((skb = skb_dequeue(&wl->tx_queue))) {
 		if (!woken_up) {
 			ret = wl1251_ps_elp_wakeup(wl);
-			if (ret < 0)
+			if (ret < 0) {
+				skb_queue_head(&wl->tx_queue, skb);
 				goto out;
+			}
 			woken_up = true;
 		}
 
-- 
2.47.2