openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[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>
This commit is contained in:
Akinobu Mita 2013-04-16 22:11:57 +09:00 committed by James Bottomley
parent ac17078ae6
commit cc34a8e663
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/scsi_debug.c
View File

@ -2059,8 +2059,9 @@ static void unmap_region(sector_t lba, unsigned int len)
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;
}