[PATCH] target: Fix iblock se_dev_attrib.unmap_granularity

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From: Marco Sanvido <marco@xxxxxxxxxxxxxxx>

The block layer keeps q->limits.discard_granularity in bytes, but iblock
(and the SCSI Block Limits VPD page) keep unmap_granularity in blocks.
Report the correct value when exporting block devices by dividing to
convert bytes to blocks.

Signed-off-by: Roland Dreier <roland@xxxxxxxxxxxxxxx>
---
 drivers/target/target_core_iblock.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index cc8e6b5..8950206 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -181,7 +181,7 @@ static struct se_device *iblock_create_virtdevice(
 		 */
 		dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count = 1;
 		dev->se_sub_dev->se_dev_attrib.unmap_granularity =
-				q->limits.discard_granularity;
+				q->limits.discard_granularity >> 9;
 		dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
 				q->limits.discard_alignment;
 
-- 
1.7.8.3

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