[PATCH] md: avoid a deadlock when removing a device from an md array via sysfs
authorNeilBrown <neilb@suse.de>
Thu, 5 Apr 2007 02:08:18 +0000 (19:08 -0700)
committerLinus Torvalds <torvalds@woody.linux-foundation.org>
Thu, 5 Apr 2007 04:12:47 +0000 (21:12 -0700)
commit5792a2856a63cdc568e08a7d6f9b2413d9217b3e
tree042a09fbfdf75dac5efa3bf61c7d6c6dd4c6ba7f
parent456a09dce9ca9b0013cabcda918aee851a04471d
[PATCH] md: avoid a deadlock when removing a device from an md array via sysfs

A device can be removed from an md array via e.g.
  echo remove > /sys/block/md3/md/dev-sde/state

This will try to remove the 'dev-sde' subtree which will deadlock
since
  commit e7b0d26a86943370c04d6833c6edba2a72a6e240

With this patch we run the kobject_del via schedule_work so as to
avoid the deadlock.

Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/md/md.c
include/linux/raid/md_k.h