[SCSI] scsi_debug: clear correct memory region when LBPRZ is enabled
The function unmap_region() clears memory region specified as the logical
block address and the number of logical blocks in ramdisk storage
(fake_storep) if lbpu and lbprz module parameters are enabled.
In the while loop of unmap_region(), it advances optimal unmap granularity
in logical blocks. But it only clears one logical block at LBA 'block' per
loop iteration. And furthermore, the 'block' is not pointing to a logical
block address which should be cleared, it is a index of probisioning map
(map_storep).
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 5c32140..4b5d388 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -2059,8 +2059,9 @@
clear_bit(block, map_storep);
if (scsi_debug_lbprz)
memset(fake_storep +
- block * scsi_debug_sector_size, 0,
- scsi_debug_sector_size);
+ lba * scsi_debug_sector_size, 0,
+ scsi_debug_sector_size *
+ scsi_debug_unmap_granularity);
}
lba += granularity - rem;
}