cvs commit: src/sys/dev/usb ugen.c

[Warner Losh]

imp         2004-09-08 07:13:39 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/usb          ugen.c 
  Log:
  Back out 1.88.
  
  The reference counts are there to block detach until the sleepers in
  read/write/ioctl have gotten out, not to prevent the open device from
  going away.  Restore the old behavior so that we have a chance to wake
  up sleepers when the usb device goes away, so they can properly return
  EIO back to the caller when this happens.
  
  Otherwise, we have a guarnateed panic waiting to happen when a device
  detaches with an active read channel.
  
  This should be merged to 5 asap.
  
  Revision  Changes    Path
  1.89      +11 -9     src/sys/dev/usb/ugen.c