This is a note to let you know that I've just added the patch titled wifi: ath6kl: reduce WARN to dev_dbg() in callback to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: wifi-ath6kl-reduce-warn-to-dev_dbg-in-callback.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit fb6ee7e093e0a4fd970ecb423b2eafbc7c8f85a5 Author: Fedor Pchelkin <pchelkin@xxxxxxxxx> Date: Fri Feb 24 12:28:05 2023 +0200 wifi: ath6kl: reduce WARN to dev_dbg() in callback [ Upstream commit 75c4a8154cb6c7239fb55d5550f481f6765fb83c ] The warn is triggered on a known race condition, documented in the code above the test, that is correctly handled. Using WARN() hinders automated testing. Reducing severity. Fixes: de2070fc4aa7 ("ath6kl: Fix kernel panic on continuous driver load/unload") Reported-and-tested-by: syzbot+555908813b2ea35dae9a@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Oliver Neukum <oneukum@xxxxxxxx> Signed-off-by: Fedor Pchelkin <pchelkin@xxxxxxxxx> Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx> Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20230126182431.867984-1-pchelkin@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/wireless/ath/ath6kl/htc_pipe.c b/drivers/net/wireless/ath/ath6kl/htc_pipe.c index c68848819a52d..9b88d96bfe96c 100644 --- a/drivers/net/wireless/ath/ath6kl/htc_pipe.c +++ b/drivers/net/wireless/ath/ath6kl/htc_pipe.c @@ -960,8 +960,8 @@ static int ath6kl_htc_pipe_rx_complete(struct ath6kl *ar, struct sk_buff *skb, * Thus the possibility of ar->htc_target being NULL * via ath6kl_recv_complete -> ath6kl_usb_io_comp_work. */ - if (WARN_ON_ONCE(!target)) { - ath6kl_err("Target not yet initialized\n"); + if (!target) { + ath6kl_dbg(ATH6KL_DBG_HTC, "Target not yet initialized\n"); status = -EINVAL; goto free_skb; }