• David Brownell's avatar
    [PATCH] USB: ehci update: 2/3, microframe scanning · 49597169
    David Brownell authored
    This patch is needed to make high bandwidth ISO streams behave,
    but could resolve some other scanning glitches.  Current users
    of periodic transfers (interrupt transfer modes for hubs, mice,
    and keyboards) shouldn't even notice this change.
    
    It makes the periodic schedule scan handle cases where a given
    frame's schedule slot reports completions in several different
    microframes.  So far that's been uncommon, but it's typical
    for high bandwidth iso (or even with busier interrupt trees than
    this driver has supported yet).
    
    It also starts to remove the assumption that each ITD only uses
    one microframe; but most of those changes are in the next patch.
    And it fixes a bug where some status bits were mis-interpreted as
    significant bits in the ITD transfer length.
    49597169
ehci.h 17 KB