mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-26 00:41:17 +00:00
34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Fri, 1 Mar 2019 14:42:56 +0100
|
|
Subject: [PATCH] mac80211: do not call driver wake_tx_queue op during reconfig
|
|
|
|
There are several scenarios in which mac80211 can call drv_wake_tx_queue
|
|
after ieee80211_restart_hw has been called and has not yet completed.
|
|
Driver private structs are considered uninitialized until mac80211 has
|
|
uploaded the vifs, stations and keys again, so using private tx queue
|
|
data during that time is not safe.
|
|
|
|
The driver can also not rely on drv_reconfig_complete to figure out when
|
|
it is safe to accept drv_wake_tx_queue calls again, because it is only
|
|
called after all tx queues are woken again.
|
|
|
|
To fix this, bail out early in drv_wake_tx_queue if local->in_reconfig
|
|
is set.
|
|
|
|
Cc: stable@vger.kernel.org
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
|
|
--- a/net/mac80211/driver-ops.h
|
|
+++ b/net/mac80211/driver-ops.h
|
|
@@ -1166,6 +1166,9 @@ static inline void drv_wake_tx_queue(str
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->txq.vif);
|
|
|
|
+ if (local->in_reconfig)
|
|
+ return;
|
|
+
|
|
if (!check_sdata_in_driver(sdata))
|
|
return;
|
|
|