Re: xHCI bug fixes for 2.6.37

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On Fri, Nov 19, 2010 at 11:04:24PM -0800, Sarah Sharp wrote:
> On Fri, Nov 19, 2010 at 04:52:40PM -0800, Greg KH wrote:
> > On Fri, Nov 19, 2010 at 04:49:40PM -0800, Sarah Sharp wrote:
> > > Hi Greg,
> > > 
> > > Here's three more bug fixes that should be queued for 2.6.37.
> > > 
> > > Paul's patch fixes an issue he had with the xHCI driver while unplugging
> > > and replugging in USB devices a bunch of times.
> > 
> > Is this a regression?
> 
> Yes, Paul's patch fixes a regression introduced in 2.6.35 (noted if you
> read the bit about which stable trees to apply it to).  It should
> definitely go into 2.6.37.
> 
> > > The last two patches partially solve Don Zickus' issues with a broken USB
> > > 3.0 device not surviving system suspend.  With these two patches, it
> > > comes back as a SuperSpeed device, and that's an improvement over being
> > > stuck as a High Speed device.  However, USB persist doesn't work because
> > > the device disconnects from SS on system resume and reconnects on the SS
> > > port after it's reset as a HS device.  I'm going to try to work up
> > > another patch to fix the USB persist issue next week, but please take
> > > these two patches for now.
> > 
> > Are these really needed now for .37?  Or could they wait?
> 
> The last two patches solve a particularly nasty bug that people will run
> into when they try to test the newly added xHCI suspend support.  No
> oopses, but they'll loose the ability to have *any* USB 3.0 devices
> connect at SuperSpeed for any port this happens to.  They'll only regain
> the ability for devices to connect at SuperSpeed once they reboot.  I
> think this will cause great confusion for users.  But if you think it's
> too big, it's probably ok to wait for 2.6.38.  Let me know if you need
> me to shuffle patches around.

Ok, I've stared at these for a while, and beat on them here with my
machine and it all looks good, so I'm going to queue them up to go to
Linus this week.

thanks,

greg k-h
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