Timer is required to flush out entries that may be present in work queues.

Cc: stable@kernel.org
Signed-off-by: NArun Easi <arun.easi@qlogic.com>
Signed-off-by: NMadhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: NJames Bottomley <jbottomley@parallels.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>