Re: Allocating buffers for USB transfers (again)

[MatÄj Laitl]

On 12.â8.â2011 Daniel Mack wrote:
> > This patch actually makes the sound playback _worse_. Now I get strange
> > squawks where previously at least first seconds of a song sounded
> > normally.
> > 
> > However, I no longer get "zero length buffer submitted" or that "...
> > Weird." debug messages, only several megabytes of: (should I post these
> > somewhere?)
> > 
> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114cec000, len = 880,
> > expected = 1000, status = -115
> > xhci_hcd 0000:05:00.0: Giveback URB ffff880114740000, len = 352,
> > expected = 1000, status = -115
> > xhci_hcd 0000:05:00.0: underrun event on endpoint
> 
> Might be the hardware doesn't like this. As I said, the patch is blindly 
> written and I couldn't test it. Did you test this on a EHCI port as well?

Good point, this patch distorts the playback also on the EHCI port. (the 
playback seems to be 10 times slower than it should be)

Now I have to go, but I hope I'll get another patch from you tomorrow. :-)

Thanks,
               Matej

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