forked from luck/tmp_suning_uos_patched
virtio: set max_segment_size and max_sectors to infinite.
Setting max_segment_size allows more than 64k per sg element, unless the host specified a limit. Setting max_sectors indicates that our max_hw_segments is the only limit. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -277,6 +277,9 @@ static int virtblk_probe(struct virtio_device *vdev)
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}
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set_capacity(vblk->disk, cap);
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/* No real sector limit. */
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blk_queue_max_sectors(vblk->disk->queue, -1U);
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/* Host can optionally specify maximum segment size and number of
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* segments. */
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err = virtio_config_val(vdev, VIRTIO_BLK_F_SIZE_MAX,
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@ -284,6 +287,8 @@ static int virtblk_probe(struct virtio_device *vdev)
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&v);
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if (!err)
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blk_queue_max_segment_size(vblk->disk->queue, v);
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else
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blk_queue_max_segment_size(vblk->disk->queue, -1UL);
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err = virtio_config_val(vdev, VIRTIO_BLK_F_SEG_MAX,
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offsetof(struct virtio_blk_config, seg_max),
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