linux-kernel - [238/244] iwlegacy: fix command queue timeout

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Date:	Wed, 28 Sep 2011 15:03:22 -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,
	Stanislaw Gruszka <sgruszka@...hat.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [238/244] iwlegacy: fix command queue timeout

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

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

From: Stanislaw Gruszka <sgruszka@...hat.com>

commit 2e2a41d6ca07d1b2aa67015c35fd80701c98e867 upstream.

iwlegacy version of fix:

commit 282cdb325aea4ebbc42ce753b47cc96145eb54bc
Author: Johannes Berg <johannes.berg@...el.com>
Date:   Mon Sep 12 12:09:10 2011 -0700

    iwlagn: fix command queue timeout

    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.

iwlegacy does not support P2P, but this patch fix possible
unneeded hardware resets, hence is needed.

Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
Signed-off-by: John W. Linville <linville@...driver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

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

--- a/drivers/net/wireless/iwlegacy/iwl-tx.c
+++ b/drivers/net/wireless/iwlegacy/iwl-tx.c
@@ -625,6 +625,8 @@ iwl_legacy_tx_cmd_complete(struct iwl_pr
 	cmd = txq->cmd[cmd_index];
 	meta = &txq->meta[cmd_index];
 
+	txq->time_stamp = jiffies;
+
 	pci_unmap_single(priv->pci_dev,
 			 dma_unmap_addr(meta, mapping),
 			 dma_unmap_len(meta, len),


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