This is a note to let you know that I've just added the patch titled
wifi: ath11k: fix SAC bug on peer addition with sta band migration
to the 6.2-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-ath11k-fix-sac-bug-on-peer-addition-with-sta-ba.patch
and it can be found in the queue-6.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4734774eb63065b0ac11a3efb48e513afaacd474
Author: Christian Marangi <ansuelsmth@xxxxxxxxx>
Date: Thu Feb 9 23:26:22 2023 +0100
wifi: ath11k: fix SAC bug on peer addition with sta band migration
[ Upstream commit 60b7d62ba8cdbd073997bff0f1cdae8d844002c0 ]
Fix sleep in atomic context warning detected by Smatch static checker
analyzer.
Following the locking pattern for peer_rhash_add lock tbl_mtx_lock mutex
always even if sta is not transitioning to another band.
This is peer_add function and a more secure locking should not cause
performance regression.
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.5.0.1-01208-QCAHKSWPL_SILICONZ-1
Fixes: d673cb6fe6c0 ("wifi: ath11k: fix peer addition/deletion error on sta band migration")
Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230209222622.1751-1-ansuelsmth@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/wireless/ath/ath11k/peer.c b/drivers/net/wireless/ath/ath11k/peer.c
index 1ae7af02c364e..1380811827a84 100644
--- a/drivers/net/wireless/ath/ath11k/peer.c
+++ b/drivers/net/wireless/ath/ath11k/peer.c
@@ -382,22 +382,23 @@ int ath11k_peer_create(struct ath11k *ar, struct ath11k_vif *arvif,
return -ENOBUFS;
}
+ mutex_lock(&ar->ab->tbl_mtx_lock);
spin_lock_bh(&ar->ab->base_lock);
peer = ath11k_peer_find_by_addr(ar->ab, param->peer_addr);
if (peer) {
if (peer->vdev_id == param->vdev_id) {
spin_unlock_bh(&ar->ab->base_lock);
+ mutex_unlock(&ar->ab->tbl_mtx_lock);
return -EINVAL;
}
/* Assume sta is transitioning to another band.
* Remove here the peer from rhash.
*/
- mutex_lock(&ar->ab->tbl_mtx_lock);
ath11k_peer_rhash_delete(ar->ab, peer);
- mutex_unlock(&ar->ab->tbl_mtx_lock);
}
spin_unlock_bh(&ar->ab->base_lock);
+ mutex_unlock(&ar->ab->tbl_mtx_lock);
ret = ath11k_wmi_send_peer_create_cmd(ar, param);
if (ret) {
