This is a note to let you know that I've just added the patch titled
iwlwifi: always monitor for stuck queues
to the 3.2-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:
iwlwifi-always-monitor-for-stuck-queues.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 342bbf3fee2fa9a18147e74b2e3c4229a4564912 Mon Sep 17 00:00:00 2001
From: Johannes Berg <[email protected]>
Date: Sun, 4 Mar 2012 08:50:46 -0800
Subject: iwlwifi: always monitor for stuck queues
From: Johannes Berg <[email protected]>
commit 342bbf3fee2fa9a18147e74b2e3c4229a4564912 upstream.
If we only monitor while associated, the following
can happen:
- we're associated, and the queue stuck check
runs, setting the queue "touch" time to X
- we disassociate, stopping the monitoring,
which leaves the time set to X
- almost 2s later, we associate, and enqueue
a frame
- before the frame is transmitted, we monitor
for stuck queues, and find the time set to
X, although it is now later than X + 2000ms,
so we decide that the queue is stuck and
erroneously restart the device
It happens more with P2P because there we can
go between associated/unassociated frequently.
Reported-by: Ben Cahill <[email protected]>
Signed-off-by: Johannes Berg <[email protected]>
Signed-off-by: Wey-Yi Guy <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/iwlwifi/iwl-core.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
--- a/drivers/net/wireless/iwlwifi/iwl-core.c
+++ b/drivers/net/wireless/iwlwifi/iwl-core.c
@@ -1787,20 +1787,10 @@ void iwl_bg_watchdog(unsigned long data)
if (timeout == 0)
return;
- /* monitor and check for stuck cmd queue */
- if (iwl_check_stuck_queue(priv, priv->shrd->cmd_queue))
- return;
-
- /* monitor and check for other stuck queues */
- if (iwl_is_any_associated(priv)) {
- for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++) {
- /* skip as we already checked the command queue */
- if (cnt == priv->shrd->cmd_queue)
- continue;
- if (iwl_check_stuck_queue(priv, cnt))
- return;
- }
- }
+ /* monitor and check for stuck queues */
+ for (cnt = 0; cnt < hw_params(priv).max_txq_num; cnt++)
+ if (iwl_check_stuck_queue(priv, cnt))
+ return;
mod_timer(&priv->watchdog, jiffies +
msecs_to_jiffies(IWL_WD_TICK(timeout)));
Patches currently in stable-queue which might be from [email protected]
are
queue-3.2/iwlwifi-always-monitor-for-stuck-queues.patch
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