linux-kernel - [137/244] iwlagn: fix command queue timeout

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Date:	Wed, 28 Sep 2011 15:01:41 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Johannes Berg <johannes.berg@...el.com>,
	Wey-Yi Guy <wey-yi.w.guy@...el.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [137/244] iwlagn: fix command queue timeout

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Johannes Berg <johannes.berg@...el.com>

commit 282cdb325aea4ebbc42ce753b47cc96145eb54bc upstream.

If the command queue is constantly busy,
which can happen in P2P, the hangcheck
timer will frequently find a command in
it and will eventually reset the device
because nothing sets the timestamp for
this queue when commands are processed.

Fix this by setting the timestamp when
a command completes.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@...el.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/net/wireless/iwlwifi/iwl-tx.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/wireless/iwlwifi/iwl-tx.c
+++ b/drivers/net/wireless/iwlwifi/iwl-tx.c
@@ -802,6 +802,8 @@ void iwl_tx_cmd_complete(struct iwl_priv
 	cmd = txq->cmd[cmd_index];
 	meta = &txq->meta[cmd_index];

+	txq->time_stamp = jiffies;
+
 	iwlagn_unmap_tfd(priv, meta, &txq->tfds[index], PCI_DMA_BIDIRECTIONAL);

 	/* Input error checking is done when commands are added to queue. */

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