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    SubjectRe: Allocating buffers for USB transfers (again)
    Date
    On 12. 8. 2011 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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