cvs commit: src/sys/dev/usb ehci.c ohci.c

[Andrew Thompson]

thompsa     2008-07-28 16:09:22 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/dev/usb          ehci.c ohci.c 
  Log:
  SVN rev 180899 on 2008-07-28 16:09:22Z by thompsa
  
  MFC r177459
  
   Workaround design botch in usb: blindly mixing bus_dma with PIO does not
   work on architectures with a write-back cache as the PIO writes end up
   in the cache which the sync(BUS_DMASYNC_POSTREAD) in usb_transfer_complete
   then discards; compensate in the xfer methods that do PIO by pushing the
   writes out of the cache before usb_transfer_complete is called.
  
  Revision   Changes    Path
  1.56.2.2   +16 -0     src/sys/dev/usb/ehci.c
  1.170.2.1  +16 -0     src/sys/dev/usb/ohci.c