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vhost-scsi: reduce flushes during endpoint clearing

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vhost_scsi_flush will flush everything, so we can clear the backends then
flush, then destroy. We don't need to flush before each vq destruction
because after the flush we will have made sure there can be no new cmds
started and there are no running cmds.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20210525174733.6212-4-michael.christie@oracle.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mike Christie 2021-05-25 12:47:31 -05:00 committed by Michael S. Tsirkin
parent 31fbea3ab9
commit d60146c161
1 changed files with 6 additions and 5 deletions
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11
drivers/vhost/scsi.c
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@ -1732,11 +1732,12 @@ vhost_scsi_clear_endpoint(struct vhost_scsi *vs,
mutex_lock(&vq->mutex);
vhost_vq_set_backend(vq, NULL);
mutex_unlock(&vq->mutex);
/*
* Make sure cmds are not running before tearing them
* down.
*/
vhost_scsi_flush(vs);
}
/* Make sure cmds are not running before tearing them down. */
vhost_scsi_flush(vs);
for (i = 0; i < VHOST_SCSI_MAX_VQ; i++) {
vq = &vs->vqs[i].vq;
vhost_scsi_destroy_vq_cmds(vq);
}
}