1. 30 5月, 2007 1 次提交
    • A
      USB: replace flush_workqueue with cancel_sync_work · d5d4db70
      Alan Stern 提交于
      This patch (as912) replaces a couple of calls to flush_workqueue()
      with cancel_sync_work() and cancel_rearming_delayed_work().  Using a
      more directed approach allows us to avoid some nasty deadlocks.  The
      prime example occurs when a first-level device (the parent is a root
      hub) is removed while at the same time the root hub gets a remote
      wakeup request.  khubd would try to flush the autosuspend workqueue
      while holding the root-hub's lock, and the remote-wakeup workqueue
      routine would be waiting to lock the root hub.
      
      The patch also reorganizes the power management portion of
      usb_disconnect(), separating it out into its own routine.  The
      autosuspend workqueue entry is cancelled immediately instead of
      waiting for the device's release routine.  In addition,
      synchronization with the autosuspend thread is carried out even for
      root hubs (an oversight in the original code).
      Signed-off-by: NAlan Stern <stern@rowland.harvard.edu>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Greg KH <gregkh@suse.de>
      Cc: Mark Lord <lkml@rtr.ca>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      d5d4db70
  2. 26 5月, 2007 11 次提交
  3. 25 5月, 2007 28 次提交