diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2022-09-18 21:20:52 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-10-05 10:39:43 +0200 |
| commit | 67c00bcf423191faa1dd82a32fc3fcc3c5f8db1e (patch) | |
| tree | 098df6d8cd5a5b642ad6d2bc9948d0c370ba06a6 /net/mac80211 | |
| parent | 520e434a082ddedc4f174b7c86701850bd30909e (diff) | |
wifi: mac80211: fix regression with non-QoS drivers
[ Upstream commit d873697ef2b7e1b6fdd8e9d449d9354bd5d29a4a ]
Commit 10cb8e617560 ("mac80211: enable QoS support for nl80211 ctrl port")
changed ieee80211_tx_control_port() to aways call
__ieee80211_select_queue() without checking local->hw.queues.
__ieee80211_select_queue() returns a queue-id between 0 and 3, which means
that now ieee80211_tx_control_port() may end up setting the queue-mapping
for a skb to a value higher then local->hw.queues if local->hw.queues
is less then 4.
Specifically this is a problem for ralink rt2500-pci cards where
local->hw.queues is 2. There this causes rt2x00queue_get_tx_queue() to
return NULL and the following error to be logged: "ieee80211 phy0:
rt2x00mac_tx: Error - Attempt to send packet over invalid queue 2",
after which association with the AP fails.
Other callers of __ieee80211_select_queue() skip calling it when
local->hw.queues < IEEE80211_NUM_ACS, add the same check to
ieee80211_tx_control_port(). This fixes ralink rt2500-pci and
similar cards when less then 4 tx-queues no longer working.
Fixes: 10cb8e617560 ("mac80211: enable QoS support for nl80211 ctrl port")
Cc: Markus Theil <markus.theil@tu-ilmenau.de>
Suggested-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220918192052.443529-1-hdegoede@redhat.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/tx.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a499b07fee33..8f8dc2625d53 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -5719,6 +5719,9 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, skb_reset_network_header(skb); skb_reset_mac_header(skb); + if (local->hw.queues < IEEE80211_NUM_ACS) + goto start_xmit; + /* update QoS header to prioritize control port frames if possible, * priorization also happens for control port frames send over * AF_PACKET @@ -5734,6 +5737,7 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, rcu_read_unlock(); +start_xmit: /* mutex lock is only needed for incrementing the cookie counter */ mutex_lock(&local->mtx); |