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SubjectRe: SDHCI: timeout during data transfer
On Tue, 23 Sep 2008 23:24:59 +0200
Luca Tettamanti <> wrote:

> Hi,
> I'm seeing timeout errors when transfering "big" (over 1MB or so) files to a SD
> card (small files are ok):
> [ 251.956666] mmcblk0: error -110 transferring data
> [ 251.979810] end_request: I/O error, dev mmcblk0, sector 1572758

Looks like the card died on you there. Did you build the kernel
yourself? If so, it would be helpful if you could enable
CONFIG_MMC_DEBUG and give me a complete dmesg dump from when this

> kernel in use is 2.6.27-rc6, and this is the controller:
> 09:01.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
> 09:01.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
> 09:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
> 09:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12)
> Googling around I found a patch[1] that introduced a quirk to address an
> off-by-one issue for the timeout value in certain controllers.
> With this patch:

The patch doubles the timeout, so something is clearly broken if that
solves the issue. I'd like to identify if it's the driver, controller
or card first though.

Are you experiencing this with just this card, or with all?

-- Pierre Ossman

Linux kernel, MMC maintainer
rdesktop, core developer

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