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From: Ian Dowse <iedowse@FreeBSD.org>
Date: Sun, 28 May 2006 23:37:04 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/dev/usb ehci.c ohci.c uhci.c
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iedowse     2006-05-28 23:37:04 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/usb          ehci.c ohci.c uhci.c 
  Log:
  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