Hi

> Data Write Failed in PIO Mode.imx-esdhc@imx-esdhc0: timeout 2
> imx-esdhc@imx-esdhc0: timeout 1
> imx-esdhc@imx-esdhc0: timeout 1
> imx-esdhc@imx-esdhc0: timeout 1
> block_cache: blk->ops->read returned -110

Ok, so your problem is inside the esdhc driver. Sorry, I don't know what
quirks we may need here. Might be worth looking at the kernel or U-Boot
to find out.

I don't know where this driver comes from, however I have been revising the i.MX25 Chipset Errata and there are heaps of problems with regard to eSDHC. I will try to address some of them (for example WML related) and see if this fixes anything.
 
> BUG: failure at common/block.c:249/block_put()!
> BUG!

Nevertheless we'll need a fix for this. I'll prepare a patch for this if
noone else is faster ;)

Well, the BUG() is legit, I just seem to be the first to hit it. I am not sure how you want to fix it, because if it's an issue with regard to chipset errata, at least a warning has to be issues. Maybe BUG() is a bit excessive ;).

Cheers
Roberto