From: Andrew Morton <akpm@linux-foundation.org>
To: torvalds@linux-foundation.org, david.vrabel@csr.com,
linux-mmc@vger.kernel.org, mirq-linux@rere.qmqm.pl
Subject: Re: [patch 13/20] mmc: avoid getting CID on SDIO-only cards
Date: Thu, 19 Aug 2010 15:57:05 -0700 [thread overview]
Message-ID: <20100819155705.0d8f91c0.akpm@linux-foundation.org> (raw)
In-Reply-To: <201008192113.o7JLDaGh008701@imap1.linux-foundation.org>
On Thu, 19 Aug 2010 14:13:36 -0700
akpm@linux-foundation.org wrote:
> From: David Vrabel <david.vrabel@csr.com>
>
> The introduction of support for SD combo cards breaks the initialization
> of all CSR SDIO chips. The GO_IDLE (CMD0) in mmc_sd_get_cid() causes CSR
> chips to be reset (this is non-standard behavior).
>
> When initializing an SDIO card check for a combo card by using the memory
> present bit in the R4 response to IO_SEND_OP_COND (CMD5). This avoids the
> call to mmc_sd_get_cid() on an SDIO-only card.
>
argh, crap, sorry, please drop this one - Michal found a bug in it.
prev parent reply other threads:[~2010-08-19 22:57 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-19 21:13 [patch 13/20] mmc: avoid getting CID on SDIO-only cards akpm
2010-08-19 22:57 ` Andrew Morton [this message]
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