block: extract bdrv_drain_poll/bdrv_co_yield_to_drain from bdrv_drain/bdrv_co_drain
commitb6e84c97ed0d786a7cda4e184736e25bb8824c2c
authorPaolo Bonzini <pbonzini@redhat.com>
Thu, 7 Apr 2016 16:33:32 +0000 (7 18:33 +0200)
committerKevin Wolf <kwolf@redhat.com>
Thu, 12 May 2016 13:22:07 +0000 (12 15:22 +0200)
treeb005aaafff2f3c2b47157bbe18c3cb2c1622aaae
parenta72f641407f4a59c3adb710a821736166a484b7f
block: extract bdrv_drain_poll/bdrv_co_yield_to_drain from bdrv_drain/bdrv_co_drain

Do not call bdrv_drain_recurse twice in bdrv_co_drain.  A small
tweak to the logic in Fam's patch, which is harmless since no
one implements bdrv_drain anyway.  But better get it right.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
block/io.c