Merge commit 'upstream/master'

[pandora-kernel.git] / drivers / block / virtio_blk.c

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index dd7ea20..4225109 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -196,6 +196,7 @@ static int virtblk_probe(struct virtio_device *vdev)
        int err;
        u64 cap;
        u32 v;
+       u32 blk_size;
 
        if (index_to_minor(index) >= 1 << MINORBITS)
                return -ENOSPC;
@@ -290,6 +291,13 @@ static int virtblk_probe(struct virtio_device *vdev)
        if (!err)
                blk_queue_max_hw_segments(vblk->disk->queue, v);
 
+       /* Host can optionally specify the block size of the device */
+       err = virtio_config_val(vdev, VIRTIO_BLK_F_BLK_SIZE,
+                               offsetof(struct virtio_blk_config, blk_size),
+                               &blk_size);
+       if (!err)
+               blk_queue_hardsect_size(vblk->disk->queue, blk_size);
+
        add_disk(vblk->disk);
        return 0;
 
@@ -330,7 +338,7 @@ static struct virtio_device_id id_table[] = {
 
 static unsigned int features[] = {
        VIRTIO_BLK_F_BARRIER, VIRTIO_BLK_F_SEG_MAX, VIRTIO_BLK_F_SIZE_MAX,
-       VIRTIO_BLK_F_GEOMETRY, VIRTIO_BLK_F_RO,
+       VIRTIO_BLK_F_GEOMETRY, VIRTIO_BLK_F_RO, VIRTIO_BLK_F_BLK_SIZE,
 };
 
 static struct virtio_driver virtio_blk = {