[PATCH 5.15 115/511] Bluetooth: btusb: Do not call kfree_skb() under spin_lock_irqsave()

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>

[ Upstream commit 2a05334d7f91ff189692089c05fc48cc1d8204de ]

It is not allowed to call kfree_skb() from hardware interrupt
context or with hardware interrupts being disabled.
So replace kfree_skb() with dev_kfree_skb_irq() under
spin_lock_irqsave(). Compile tested only.

Fixes: baac6276c0a9 ("Bluetooth: btusb: handle mSBC audio over USB Endpoints")
Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/bluetooth/btusb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 15d253325fd8a..84a42348b3bcb 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -1756,7 +1756,7 @@ static int btusb_switch_alt_setting(struct hci_dev *hdev, int new_alts)
 		 * alternate setting.
 		 */
 		spin_lock_irqsave(&data->rxlock, flags);
-		kfree_skb(data->sco_skb);
+		dev_kfree_skb_irq(data->sco_skb);
 		data->sco_skb = NULL;
 		spin_unlock_irqrestore(&data->rxlock, flags);
 
-- 
2.40.1






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