linux-kernel - Re: [PATCH] iwlagn: check for !priv->txq in iwlagn_wait_tx_queue

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Date:	Mon, 25 Jul 2011 13:59:07 -0700
From:	wwguy <wey-yi.w.guy@...el.com>
To:	Keith Packard <keithp@...thp.com>
Cc:	Intel Linux Wireless <ilw@...ux.intel.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iwlagn: check for !priv->txq in
 iwlagn_wait_tx_queue_empty

On Mon, 2011-07-25 at 13:03 -0700, Keith Packard wrote:
> On Mon, 25 Jul 2011 12:21:55 -0700, "Guy, Wey-Yi" <wey-yi.w.guy@...el.com> wrote:
> 
> > but why you need it?, "start device" call will fail if can not allocate
> > priv->txq
> 
> The device is down, so start_device was never called. At least, that's
> my assumption -- I've got the wireless device 'disabled' in
> NetworkManager.
> 
the iwlagn_wait_tx_queue_empty() function only can be call from either
"flush" operation or from debugfs. I agree it is a problem if call from
debugfs. did you actually see the problem when it is not from debugfs().

there is a recent patch in mac80211 to make sure do not call "flush" is
not needed.

Thanks
Wey


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