From b1e79d105516fb96c39eb8a780936b87bae8e3e1 Mon Sep 17 00:00:00 2001
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Sun, 21 Jun 2020 18:03:38 +0200
Subject: [PATCH] mt76: mt7663u: fix memory leaks in mt7663u_probe
Git-commit: b1e79d105516fb96c39eb8a780936b87bae8e3e1
Patch-mainline: v5.8-rc7
References: jsc#SLE-13430
Fix the two following memory leaks in mt7663u_probe:
1- if device power-own times out, remove ieee80211 hw device.
2- if mt76u queues allocation fails, remove pending urbs.
Fixes: eb99cc95c3b65 ("mt76: mt7615: introduce mt7663u support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/e4098f0c8a9ac51997de07f38c2bcdf7042d6db1.1592755166.git.lorenzo@kernel.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/wireless/mediatek/mt76/mt7615/usb.c | 11 ++++++-----
drivers/net/wireless/mediatek/mt76/usb.c | 22 +++++++++++++++++-----
2 files changed, 23 insertions(+), 10 deletions(-)
--- a/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/usb.c
@@ -329,25 +329,26 @@ static int mt7663u_probe(struct usb_inte
if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
FW_STATE_PWR_ON << 1, 500)) {
dev_err(dev->mt76.dev, "Timeout for power on\n");
- return -EIO;
+ ret = -EIO;
+ goto error;
}
alloc_queues:
ret = mt76u_alloc_mcu_queue(&dev->mt76);
if (ret)
- goto error;
+ goto error_free_q;
ret = mt76u_alloc_queues(&dev->mt76);
if (ret)
- goto error;
+ goto error_free_q;
ret = mt7663u_register_device(dev);
if (ret)
- goto error_freeq;
+ goto error_free_q;
return 0;
-error_freeq:
+error_free_q:
mt76u_queues_deinit(&dev->mt76);
error:
mt76u_deinit(&dev->mt76);
--- a/drivers/net/wireless/mediatek/mt76/usb.c
+++ b/drivers/net/wireless/mediatek/mt76/usb.c
@@ -1066,11 +1066,16 @@ static int mt76u_alloc_tx(struct mt76_de
static void mt76u_free_tx(struct mt76_dev *dev)
{
- struct mt76_queue *q;
- int i, j;
+ int i;
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
+ struct mt76_queue *q;
+ int j;
+
q = dev->q_tx[i].q;
+ if (!q)
+ continue;
+
for (j = 0; j < q->ndesc; j++)
usb_free_urb(q->entry[j].urb);
}
@@ -1078,17 +1083,22 @@ static void mt76u_free_tx(struct mt76_de
void mt76u_stop_tx(struct mt76_dev *dev)
{
- struct mt76_queue_entry entry;
- struct mt76_queue *q;
- int i, j, ret;
+ int ret;
ret = wait_event_timeout(dev->tx_wait, !mt76_has_tx_pending(&dev->phy),
HZ / 5);
if (!ret) {
+ struct mt76_queue_entry entry;
+ struct mt76_queue *q;
+ int i, j;
+
dev_err(dev->dev, "timed out waiting for pending tx\n");
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
q = dev->q_tx[i].q;
+ if (!q)
+ continue;
+
for (j = 0; j < q->ndesc; j++)
usb_kill_urb(q->entry[j].urb);
}
@@ -1100,6 +1110,8 @@ void mt76u_stop_tx(struct mt76_dev *dev)
*/
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
q = dev->q_tx[i].q;
+ if (!q)
+ continue;
/* Assure we are in sync with killed tasklet. */
spin_lock_bh(&q->lock);