linux-kernel - Re: [PATCH] libertas sdio: remove CMD_FUNC

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Message-ID: <20130130192700.GF2167@tuxdriver.com>
Date:	Wed, 30 Jan 2013 14:27:00 -0500
From:	"John W. Linville" <linville@...driver.com>
To:	Bing Zhao <bzhao@...vell.com>
Cc:	Lubomir Rintel <lkundrak@...sk>, Harro Haan <hrhaan@...il.com>,
	Dan Williams <dcbw@...hat.com>,
	"libertas-dev@...ts.infradead.org" <libertas-dev@...ts.infradead.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libertas sdio: remove CMD_FUNC_INIT call

On Fri, Jan 18, 2013 at 12:28:17PM -0800, Bing Zhao wrote:
> Hi Lubomir,
> 
> > It actually times out on a 8688 present in GuruPlug with sd8688.bin
> > (md5=7233401e9687f8c880da547beed4324e) firmware (that's present in
> > linux-firmware tree), but the adapter works fine.
> > 
> > For that firmware times out with libertas_uap [1] as well, though it succeeds
> > with sd8688_ap.bin (md5=52cd8f8296b9a7e1d3835d57416256b2) that was originally
> > shipped with GuruPlug. That firmware is not in linux-firmware tree and btmrvl
> > driver might win the race programming the 8688 with sd8688.bin anyway.
> > 
> > [1] https://github.com/lkundrak/linux/tree/libertas_uap
> > ---
> >  drivers/net/wireless/libertas/if_sdio.c |   14 --------------
> >  1 files changed, 0 insertions(+), 14 deletions(-)
> > 
> > diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
> > index 2ecab49..3c4c555 100644
> > --- a/drivers/net/wireless/libertas/if_sdio.c
> > +++ b/drivers/net/wireless/libertas/if_sdio.c
> > @@ -825,20 +825,6 @@ static void if_sdio_finish_power_on(struct if_sdio_card *card)
> > 
> >  	sdio_release_host(func);
> > 
> > -	/*
> > -	 * FUNC_INIT is required for SD8688 WLAN/BT multiple functions
> > -	 */
> > -	if (card->model == MODEL_8688) {
> > -		struct cmd_header cmd;
> > -
> > -		memset(&cmd, 0, sizeof(cmd));
> > -
> > -		lbs_deb_sdio("send function INIT command\n");
> > -		if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
> > -				lbs_cmd_copyback, (unsigned long) &cmd))
> > -			netdev_alert(priv->dev, "CMD_FUNC_INIT cmd failed\n");
> > -	}
> > -
> 
> Removing FUNC_INIT could break things in some scenarios.
> Could you please test the following case?
> 
> 1. insmod liberates -> download firmware, send FUNC_INIT, ...
> 2. rmmod libertas -> send FUNC_SHUTDOWN command to firmware; BT is still working.
> 3. insmod libertas -> skip firmware downloading, send FUNC_INIT, ...
> 
> If FUNC_INIT is removed, I don't expect step 3 to work.
> 
> Thanks,
> Bing
> 
> >  	priv->fw_ready = 1;
> >  	wake_up(&card->pwron_waitq);
> > 
> > --
> > 1.7.1
> 

Lubomir, any reply?  Should I drop this one?

-- 
John W. Linville		Someday the world will need a hero, and you
linville@...driver.com			might be all we have.  Be ready.
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