tree 06c125fb23f5bd7b61f10d0d21110b8ed7ebccca
parent 71df1d7ccad1c36f7321d6b3b48f2ea42681c363
author Juergen Gross <jgross@suse.com> 1495121329 +0200
committer Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> 1497385659 -0400

xen/blkback: don't use xen_blkif_get() in xen-blkback kthread

There is no need to use xen_blkif_get()/xen_blkif_put() in the kthread
of xen-blkback. Thread stopping is synchronous and using the blkif
reference counting in the kthread will avoid to ever let the reference
count drop to zero at the end of an I/O running concurrent to
disconnecting and multiple rings.

Setting ring->xenblkd to NULL after stopping the kthread isn't needed
as the kthread does this already.

Signed-off-by: Juergen Gross <jgross@suse.com>
Tested-by: Steven Haigh <netwiz@crc.id.au>
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>