Niels Dossche <dossche.niels@xxxxxxxxx> writes:
> ath11k_peer_find_by_addr states via lockdep that ab->base_lock must be
> held when calling that function in order to protect the list. All
> callers except ath11k_mac_op_unassign_vif_chanctx have that lock
> acquired when calling ath11k_peer_find_by_addr. That lock is also not
> transitively held by a path towards ath11k_mac_op_unassign_vif_chanctx.
> The solution is to acquire the lock when calling
> ath11k_peer_find_by_addr inside ath11k_mac_op_unassign_vif_chanctx.
>
> Fixes: 701e48a43e15 ("ath11k: add packet log support for QCA6390")
> Signed-off-by: Niels Dossche <dossche.niels@xxxxxxxxx>
> ---
> drivers/net/wireless/ath/ath11k/mac.c | 12 +++++++++---
> 1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
> index 07f499d5ec92..5db2333478a2 100644
> --- a/drivers/net/wireless/ath/ath11k/mac.c
> +++ b/drivers/net/wireless/ath/ath11k/mac.c
> @@ -7077,9 +7077,15 @@ ath11k_mac_op_unassign_vif_chanctx(struct ieee80211_hw *hw,
> WARN_ON(!arvif->is_started);
>
> if (ab->hw_params.vdev_start_delay &&
> - arvif->vdev_type == WMI_VDEV_TYPE_MONITOR &&
> - ath11k_peer_find_by_addr(ab, ar->mac_addr))
> - ath11k_peer_delete(ar, arvif->vdev_id, ar->mac_addr);
> + arvif->vdev_type == WMI_VDEV_TYPE_MONITOR) {
> + struct ath11k_peer *peer;
In the pending branch I moved the declaration to the beginning of the
function and added this to the commit log:
"I am currently working on a static analyser to detect missing locks and
this was a reported case. I manually verified the report by looking at
the code, but I do not have real hardware so this is compile tested
only."
--
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