Re: [PATCH] mmc:sdhci: handle busy-end interrupt during command
From: Ulf Hansson
Date: Fri Aug 29 2014 - 07:18:50 EST
On 21 August 2014 09:26, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
> On 21 August 2014 03:53, Chanho Min <chanho.min@xxxxxxx> wrote:
>> It is fully legal for a controller to start handling busy-end interrupt
>> before it has signaled that the command has completed. So make sure
>> we do things in the proper order, Or it results that command interrupt
>> is ignored so it can cause unexpected operations. This is founded at some
>> toshiba emmc with the bellow warning.
>> "mmc0: Got command interrupt 0x00000001 even though
>> no command operation was in progress."
>> This issue has been also reported by Youssef TRIKI:
>> It is not specific to Toshiba devices, and happens with eMMC devices
>> as well as SD card which support Auto-CMD12 rather than CMD23.
>> Also, similar patch is submitted by:
>> Gwendal Grignou <gwendal@xxxxxxxxxxxx>
>> Signed-off-by: Hankyung Yu <hankyung.yu@xxxxxxx>
>> Signed-off-by: Chanho Min <chanho.min@xxxxxxx>
>> Tested-by: Youssef TRIKI <youssef.triki@xxxxxx>
> Hi Chanho,
> This patch has been around for quite some time, sorry for lack of
> response. Appreciate if we could get this tested on a few more
> variants of sdhci, I am not able to test myself.
> I plan to queue this for 3.18, unless someone objects soon.
I was about to apply this one, but I am hitting a conflict. Even if
wasn't too hard for me to resolve it, I think it might need an extra
round of testing. Could you please re-spin and send a new version?
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