[Bug 247819] Re: Ricoh R5C822 SDHC Card reader I/O errors

[Maxim Levitsky]

Can anyone test 2.6.35 kernel from 10.10 to confirm that you still have
that issue?

It was found that this controller supports DMA but doesn't tell the linux that it does. Therefore linux would revert to using slow PIO mode (cpu runs in a loop and read data byte after byte). 
I think this causes timeouts, and one of you even noticed that increasing timeout helps.

Btw, it contains a driver to read xD cards as well (mine :-))
I hope I will eventually write the MemoryStick driver as well.

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

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Ricoh R5C822 SDHC Card reader I/O errors
https://bugs.launchpad.net/bugs/247819
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