RE: kernel 2.6.38.6 MMC controller problem (fwd)

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> -----Original Message-----
> From: linux-mmc-owner@xxxxxxxxxxxxxxx
> [mailto:linux-mmc-owner@xxxxxxxxxxxxxxx] On Behalf Of Linus Walleij
> Sent: Tuesday, May 17, 2011 1:56 AM
> To: Guennadi Liakhovetski
> Cc: Chris Ball; David Strobach; linux-mmc@xxxxxxxxxxxxxxx; Greg KH;
> horms@xxxxxxxxxxxx; damm@xxxxxxxxxxxxx; Andrei Warkentin
> Subject: Re: kernel 2.6.38.6 MMC controller problem (fwd)
> 
> 2011/5/16 Guennadi Liakhovetski <g.liakhovetski@xxxxxx>:
> > On Mon, 16 May 2011, Chris Ball wrote:
> >> My intuition is that we should revert it now -- it's been a week since
> >> the final -rc, so you'd expect .39 to be released today, and we can
> >> always add your patch back into stable via .40-rc1 if it's not related
> >> to the crashes.
> >
> > Ok, let's revert it then. Just we have to not forget to work on this
> > problem and find a proper fix.
> 
> I'm still baffled by the whole thing, the solution seems so intuitively
> correct. :-(
> 
> Is there something strange in the semantics of mmc_claim_host()?
> 
mmc clock gating thread may be delayed for a long time in some scenarios. Since mmc_claim_host will be also used by other thread. I think this will possibly happen.
But not sure the system how to treat the long time delayed.
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