В сообщении от 1 февраля 2010 11:10:53 автор Vasily Khoruzhick написал:
> Ricoh SD/MMC card reader on Lenovo laptops (3000 n100, 3000 n200) doesn't
> announce DMA capability, however it supports DMA. Without this patch audio
> clicks and cursor is jerky during card access.

It seems that Ricoh R5C822 card reader on mentioned laptops need one more 
quirk. Here's updated patch.