netdev - Re: [PATCH -next v1] wireless: ath9k-htc: only load firmware in need

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Date:	Sat, 1 Sep 2012 13:11:32 +0800
From:	Ming Lei <ming.lei@...onical.com>
To:	linux-wireless@...r.kernel.org
Cc:	netdev@...r.kernel.org, Ming Lei <ming.lei@...onical.com>,
	ath9k-devel@...ts.ath9k.org,
	"Luis R. Rodriguez" <mcgrof@....qualcomm.com>,
	Jouni Malinen <jouni@....qualcomm.com>,
	Vasanthakumar Thiagarajan <vthiagar@....qualcomm.com>,
	Senthil Balasubramanian <senthilb@....qualcomm.com>,
	"John W. Linville" <linville@...driver.com>
Subject: Re: [PATCH -next v1] wireless: ath9k-htc: only load firmware in need

On Tue, Aug 21, 2012 at 4:04 PM, Ming Lei <ming.lei@...onical.com> wrote:
> It is not necessary to hold the firmware memory during the whole
> driver lifetime, and obviously it does waste memory. Suppose there
> are 4 ath9k-htc usb dongles working, kernel has to consume about
> 4*50KBytes RAM to cache firmware for all dongles. After applying the
> patch, kernel only caches one single firmware image in RAM for
> all ath9k-htc devices just during system suspend/resume cycle.
>
> When system is ready for loading firmware, ath9k-htc can request
> the loading from usersapce. During system resume, ath9k-htc still
> can load the firmware which was cached in kernel memory before
> system suspend.
>
> Cc: ath9k-devel@...ts.ath9k.org
> Cc: "Luis R. Rodriguez" <mcgrof@....qualcomm.com>
> Cc: Jouni Malinen <jouni@....qualcomm.com>
> Cc: Vasanthakumar Thiagarajan <vthiagar@....qualcomm.com>
> Cc: Senthil Balasubramanian <senthilb@....qualcomm.com>
> Cc: "John W. Linville" <linville@...driver.com>
> Signed-off-by: Ming Lei <ming.lei@...onical.com>
> ---
> v1:
>         fix double free of firmware in failue path of
>         ath9k_hif_usb_firmware_cb

Gentle ping, :-)


Thanks,
--
Ming Lei
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