linux-kernel - Re: [RFC][PATCH] MMC: Use write timeout value as read from CSR

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Message-ID: <20080914154817.3d618e67@mjolnir.drzeus.cx>
Date:	Sun, 14 Sep 2008 15:48:17 +0200
From:	Pierre Ossman <drzeus-mmc@...eus.cx>
To:	"Matt Fleming" <mattjfleming@...glemail.com>
Cc:	linux-kernel@...r.kernel.org, dbrownell@...rs.sourceforge.net
Subject: Re: [RFC][PATCH] MMC: Use write timeout value as read from CSR

On Tue, 9 Sep 2008 10:42:53 +0100
"Matt Fleming" <mattjfleming@...glemail.com> wrote:

> 
> The stack trace where this check is needed is here,
> 
> mmc_get_timeout()
> mmc_spi_readblock()
> mmc_spi_request()
> mmc_wait_for_req()
> mmc_send_cxd_data()
> mmc_send_csd()
> mmc_attach_sd()
> 
> Maybe it would be a good idea to move the line at
> drivers/mmc/core/mmc.c:447 up before the call to mmc_send_csd()? Then
> it'd probably be possible to remove that !host->mmc->card check from
> mmc_get_timeout().

No, that shouldn't be needed. If you look at mmc_send_cxd_data(), it
dutifully calls mmc_set_data_timeout(), so your check isn't needed (for
that case at least).

mmc_send_cid() is a bit more problematic. We probably need to
restructure things so that a mmc_card structure is available there as
well.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  rdesktop, core developer          http://www.rdesktop.org

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