Messages in this thread | | | Date | Tue, 20 Sep 2011 16:25:16 +0530 | Subject | Re: [PATCH] mmc : Use wait_for_completion_timeout() instead of wait_for_completion in case of write. | From | Murali Krishna Palnati <> |
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On Tue, Sep 20, 2011 at 4:05 PM, NamJae Jeon <linkinjeon@gmail.com> 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-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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