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author | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-01-11 18:32:10 +0300 |
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committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2019-01-11 18:32:10 +0300 |
commit | 23d19ba06b9c5614d6457f5fed349ec8f6d4dac9 (patch) | |
tree | 39f0b657e5b1b5b958780cae4ae6360f69548d50 /drivers/scsi/virtio_scsi.c | |
parent | 7d0250ed8e69fb6a66caecf60b8753a21224cc1a (diff) | |
parent | e3d093070eb0b5e3df668d3eb04100ea79343c65 (diff) | |
download | linux-23d19ba06b9c5614d6457f5fed349ec8f6d4dac9.tar.xz |
Merge drm/drm-next into drm-misc-next
drm-next has been forwarded to 5.0-rc1, and we need it to apply the damage
helper for dirtyfb series from Noralf Trønnes.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Diffstat (limited to 'drivers/scsi/virtio_scsi.c')
-rw-r--r-- | drivers/scsi/virtio_scsi.c | 56 |
1 files changed, 2 insertions, 54 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index 1c72db94270e..772b976e4ee4 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -68,33 +68,6 @@ struct virtio_scsi_vq { struct virtqueue *vq; }; -/* - * Per-target queue state. - * - * This struct holds the data needed by the queue steering policy. When a - * target is sent multiple requests, we need to drive them to the same queue so - * that FIFO processing order is kept. However, if a target was idle, we can - * choose a queue arbitrarily. In this case the queue is chosen according to - * the current VCPU, so the driver expects the number of request queues to be - * equal to the number of VCPUs. This makes it easy and fast to select the - * queue, and also lets the driver optimize the IRQ affinity for the virtqueues - * (each virtqueue's affinity is set to the CPU that "owns" the queue). - * - * tgt_seq is held to serialize reading and writing req_vq. - * - * Decrements of reqs are never concurrent with writes of req_vq: before the - * decrement reqs will be != 0; after the decrement the virtqueue completion - * routine will not use the req_vq so it can be changed by a new request. - * Thus they can happen outside the tgt_seq, provided of course we make reqs - * an atomic_t. - */ -struct virtio_scsi_target_state { - seqcount_t tgt_seq; - - /* Currently active virtqueue for requests sent to this target. */ - struct virtio_scsi_vq *req_vq; -}; - /* Driver instance state */ struct virtio_scsi { struct virtio_device *vdev; @@ -693,34 +666,12 @@ static int virtscsi_abort(struct scsi_cmnd *sc) return virtscsi_tmf(vscsi, cmd); } -static int virtscsi_target_alloc(struct scsi_target *starget) -{ - struct Scsi_Host *sh = dev_to_shost(starget->dev.parent); - struct virtio_scsi *vscsi = shost_priv(sh); - - struct virtio_scsi_target_state *tgt = - kmalloc(sizeof(*tgt), GFP_KERNEL); - if (!tgt) - return -ENOMEM; - - seqcount_init(&tgt->tgt_seq); - tgt->req_vq = &vscsi->req_vqs[0]; - - starget->hostdata = tgt; - return 0; -} - -static void virtscsi_target_destroy(struct scsi_target *starget) -{ - struct virtio_scsi_target_state *tgt = starget->hostdata; - kfree(tgt); -} - static int virtscsi_map_queues(struct Scsi_Host *shost) { struct virtio_scsi *vscsi = shost_priv(shost); + struct blk_mq_queue_map *qmap = &shost->tag_set.map[0]; - return blk_mq_virtio_map_queues(&shost->tag_set, vscsi->vdev, 2); + return blk_mq_virtio_map_queues(qmap, vscsi->vdev, 2); } /* @@ -747,9 +698,6 @@ static struct scsi_host_template virtscsi_host_template = { .slave_alloc = virtscsi_device_alloc, .dma_boundary = UINT_MAX, - .use_clustering = ENABLE_CLUSTERING, - .target_alloc = virtscsi_target_alloc, - .target_destroy = virtscsi_target_destroy, .map_queues = virtscsi_map_queues, .track_queue_depth = 1, .force_blk_mq = 1, |