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

Ian Dowse iedowse at
Sun May 28 16:38:16 PDT 2006

iedowse     2006-05-28 23:37:04 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/usb          ehci.c ohci.c uhci.c 
  If a zero-length bulk or interrupt transfer is requested then assume
  USBD_FORCE_SHORT_XFER to ensure that we actually build and execute
  a transfer. This means that the various alloc_sqtd_chain functions
  will always construct a transfer, so it is safe to modify the
  allocated descriptors on return. Previously there were cases where
  a zero length transfer would cause a NULL dereference.
  Reported by:    bp
  Revision  Changes    Path
  1.47      +2 -1      src/sys/dev/usb/ehci.c
  1.162     +7 -9      src/sys/dev/usb/ohci.c
  1.169     +8 -8      src/sys/dev/usb/uhci.c

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