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