[PATCH v3 4/5] block: virtio_blk: Set zone limits before revalidating zones

[Damien Le Moal <dlemoal@xxxxxxxxxx>]

In virtblk_probe_zoned_device(), execute blk_queue_chunk_sectors() and
blk_queue_max_zone_append_sectors() to respectively set the zoned device
zone size and maximum zone append sector limit before executing
blk_revalidate_disk_zones(). This is to allow the block layer zone
reavlidation to check these device characteristics prior to checking all
zones of the device.

Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@xxxxxxx>
---
 drivers/block/virtio_blk.c | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index b47358da92a2..1fe011676d07 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -751,7 +751,6 @@ static int virtblk_probe_zoned_device(struct virtio_device *vdev,
 {
 	u32 v, wg;
 	u8 model;
-	int ret;
 
 	virtio_cread(vdev, struct virtio_blk_config,
 		     zoned.model, &model);
@@ -806,6 +805,7 @@ static int virtblk_probe_zoned_device(struct virtio_device *vdev,
 			vblk->zone_sectors);
 		return -ENODEV;
 	}
+	blk_queue_chunk_sectors(q, vblk->zone_sectors);
 	dev_dbg(&vdev->dev, "zone sectors = %u\n", vblk->zone_sectors);
 
 	if (virtio_has_feature(vdev, VIRTIO_BLK_F_DISCARD)) {
@@ -814,26 +814,22 @@ static int virtblk_probe_zoned_device(struct virtio_device *vdev,
 		blk_queue_max_discard_sectors(q, 0);
 	}
 
-	ret = blk_revalidate_disk_zones(vblk->disk, NULL);
-	if (!ret) {
-		virtio_cread(vdev, struct virtio_blk_config,
-			     zoned.max_append_sectors, &v);
-		if (!v) {
-			dev_warn(&vdev->dev, "zero max_append_sectors reported\n");
-			return -ENODEV;
-		}
-		if ((v << SECTOR_SHIFT) < wg) {
-			dev_err(&vdev->dev,
-				"write granularity %u exceeds max_append_sectors %u limit\n",
-				wg, v);
-			return -ENODEV;
-		}
-
-		blk_queue_max_zone_append_sectors(q, v);
-		dev_dbg(&vdev->dev, "max append sectors = %u\n", v);
+	virtio_cread(vdev, struct virtio_blk_config,
+		     zoned.max_append_sectors, &v);
+	if (!v) {
+		dev_warn(&vdev->dev, "zero max_append_sectors reported\n");
+		return -ENODEV;
+	}
+	if ((v << SECTOR_SHIFT) < wg) {
+		dev_err(&vdev->dev,
+			"write granularity %u exceeds max_append_sectors %u limit\n",
+			wg, v);
+		return -ENODEV;
 	}
+	blk_queue_max_zone_append_sectors(q, v);
+	dev_dbg(&vdev->dev, "max append sectors = %u\n", v);
 
-	return ret;
+	return blk_revalidate_disk_zones(vblk->disk, NULL);
 }
 
 #else
-- 
2.41.0