From: Christoph Hellwig <hch@lst.de>
Date: Tue, 15 Feb 2022 10:31:56 +0000 (+0100)
Subject: target: fix discard alignment on partitions
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=997526630925d43576eed8fd843f5318375e34d3;p=users%2Fhch%2Fblock.git

target: fix discard alignment on partitions

Use the proper bdev_discard_alignment helper that accounts for partition
offsets.

Fixes: c66ac9db8d4a ("[SCSI] target: Add LIO target core v4.0.0-rc6")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c
index 3a1ec705cd80..16e775bcf4a7 100644
--- a/drivers/target/target_core_device.c
+++ b/drivers/target/target_core_device.c
@@ -849,8 +849,8 @@ bool target_configure_unmap_from_queue(struct se_dev_attrib *attrib,
 	 */
 	attrib->max_unmap_block_desc_count = 1;
 	attrib->unmap_granularity = q->limits.discard_granularity / block_size;
-	attrib->unmap_granularity_alignment = q->limits.discard_alignment /
-								block_size;
+	attrib->unmap_granularity_alignment =
+		bdev_discard_alignment(bdev) / block_size;
 	return true;
 }
 EXPORT_SYMBOL(target_configure_unmap_from_queue);