linux-kernel - Re: [PATCH] libertas/sdio: set ECSI and SCSI bits for 1-bit transfers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 31 Mar 2010 11:08:36 +0200
From:	Daniel Mack <daniel@...aq.de>
To:	Michał Mirosław <mirqus@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Alagu Sankar <alagusankar@...wise.com>,
	Volker Ernst <volker.ernst@...r.com>,
	Dan Williams <dcbw@...hat.com>,
	"John W. Linville" <linville@...driver.com>,
	Holger Schurig <hs4233@...l.mn-solutions.de>,
	Bing Zhao <bzhao@...vell.com>,
	libertas-dev@...ts.infradead.org, linux-wireless@...r.kernel.org,
	linux-mmc@...r.kernel.org
Subject: Re: [PATCH] libertas/sdio: set ECSI and SCSI bits for 1-bit
 transfers

On Wed, Mar 31, 2010 at 11:07:06AM +0200, Michał Mirosław wrote:
> 2010/3/30 Daniel Mack <daniel@...aq.de>:
> [...]
> > @@ -1022,6 +1025,27 @@ static int if_sdio_probe(struct sdio_func *func,
> >        if (ret)
> >                goto disable;
> >
> > +       /* For 1-bit transfers, we need to enable the interrupt flags in
> > +        * the CCCR register. Temporarily set the function number to 0
> > +        * for that. */
> > +       if ((host->caps & MMC_CAP_SDIO_IRQ) &&
> > +           (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
> > +               unsigned int num = func->num;
> > +               u8 reg;
> > +
> > +               func->num = 0;
> > +               reg = sdio_readb(func, SDIO_CCCR_IF, &ret);
> > +               if (ret)
> > +                       goto release_int;
> > +
> > +               reg |= SDIO_BUS_ECSI | SDIO_BUS_SCSI;
> > +               sdio_writeb(func, reg, SDIO_CCCR_IF, &ret);
> > +               if (ret)
> > +                       goto release_int;
> > +
> > +               func->num = num;
> > +       }
> > +
> >        card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
> >        if (ret)
> >                goto release_int;
> 
> You should probably just use mmc_io_rw_direct() in this case instead
> of abusing func->num.

Hmm, that function isn't exported, and I didn't want to change this. You
say you'd prefer that? I can cook up something that does it, no problem.


Daniel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/