Re: MMC card corruption during suspend/resume operation

[Kevin Hilman <khilman@deeprootsystems.com>]

Elvis Dowson <elvis.dowson@mac.com> writes:

> Hi,
>         I have a problem with my TI OMAP 3503 platform, where the
> microSD card that I have, gets corrupted during a suspend/resume
> operation. Do the existing power management drivers, cleanly unmount/
> mount the mmc card during a suspend/resume operation?

Is your rootfs on MMC?  If so, be sure you have 
CONFIG_MMC_UNSAFE_RESUME=y in your .config.

MMC on rootfs on PM branch works fine for me on OMAP3 Beagle.

Kevin


> I am using the TI OMAP linux 2.6.29 kernel version, with the
> android-2.6.29 kernel updates. I have installed
>
> Doing a search for the mmc card corruption issues, it would appear
> that a lot of people are facing the same issues on other platforms as
> well. It appears to be a platform issue for both the older 1.1 and 1.5
> android versions.
>
> http://forum.xda-developers.com/archive/index.php/t-495899.html
>
> http://androidforums.com/updates-cupcakes/5202-did-cupcake-eat-my-sd-card.html
>
> http://forums.t-mobile.com/tmbl/board/message?board.id=Android3&message.id=10928
>
> The problem might be because of the application or system not cleanly
> un-mounting the mmc card, thus causing it to get corrupted, e.g during
> a suspend/resume operation.
>
> So, I thought I'd ask if the existing power management drivers do a
> clean mount/unmount when it does a suspend/resume operation.
>
> Best regards,
>
> Elvis
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