commit e64be33ccaceaca67c84237dff8805b861398eab
author Ian Kent <raven@themaw.net> Wed Jul 23 21:30:20 2008 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Thu Jul 24 10:47:32 2008 -0700
tree 574c0eed196ac6115e0f042c1e4564d1b85474d2
parent f4c7da02615bebcaf89f15a8d055922f515160b8

autofs4: check kernel communication pipe is valid for write

It is possible for an autofs mount to become catatonic (and for the daemon
communication pipe to become NULL) after a wait has been initiallized but
before the request has been sent to the daemon.  We need to check for this
before sending the request packet.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>