Messages in this thread | | | Date | Sun, 20 Apr 2008 07:54:32 -0700 (PDT) | From | Alex Dubov <> | Subject | Re: [RFC] MMC multiwrite capability removal |
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--- Pierre Ossman <drzeus-list@drzeus.cx> wrote:
> On Sat, 19 Apr 2008 19:34:12 -0700 (PDT) > Alex Dubov <oakad@yahoo.com> wrote: > > > > > tifm_sd relies on controller to report the number of successfully > transferred > > blocks. Of course, I cannot be sure to what extent the controller is > > trustworthy. It worked fine until now, though. > > > > Sounds like a perfect example of when we have to report 0 upon > failures. I suspect most controllers will be like this as all the specs > I've glanced at lack the detail needed to implement a proper sector > count. > > The problems caused by reporting incorrect values here are extremely > rare and difficult to provoke, so normal testing is not likely to > uncover it. >
On the other hand, you may remember that in one of the earlier versions of the driver I actually counted busy/ready cycles during transfer and from what I remember, it appeared like controller does the right thing - decrements the page counter at the "not busy" strobe.
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