cvs commit: src/sys/dev/usb ehci.c ehcivar.h

[Julian Elischer]

julian      2005-01-01 10:44:25 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_5)
    sys/dev/usb          ehci.c ehcivar.h 
  Log:
  MFC:
  Rewrite ehci_abort_xfer() to use the method hinted at in the EHCI spec.
  to remove a transaction from the async schedule. The previous method didn't
  work well and led to the hardware writing to free'd buffers etc, as
  it didn't always know that the transaction had been aborted.
  
  Written after consultation with David Brownell who wrote the Linux
  EHCI driver.
  
  As part of this give the sqh structure a "previous" pointer.
  
  Revision  Changes    Path
  1.14.2.5  +106 -44   src/sys/dev/usb/ehci.c
  1.4.2.2   +1 -0      src/sys/dev/usb/ehcivar.h