On Tue, Sep 20, 2011 at 4:05 PM, NamJae Jeon <linkinjeon@xxxxxxxxx> wrote: > yes, I knew. But if card keep holding busy line(data 0) in the middle > of DMA operation(multi blocks write), host driver layer can not know > card status in this situation. The host driver shall start a software timer and indpendently needs to watch out for the expiry of the timeout. If the host doesn't hear back from the controller/DMA engine even after waiting for the specified timeout, then the timer handler that gets invoked can then do the necessary cleanup and inform the MMC core layer that the request failed. Does this sound feasible? -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
