Commit ac17078a authored by Akinobu Mita's avatar Akinobu Mita Committed by James Bottomley

[SCSI] scsi_debug: prohibit scsi_debug_unmap_granularity == scsi_debug_unmap_alignment

scsi_debug prohibits setting scsi_debug_unmap_alignment to be greater
than scsi_debug_unmap_granularity.  But setting them to be the same value
is not prohibited.  In this case, the only difference with
scsi_debug_unmap_alignment == 0 is the logical blocks from 0 to
scsi_debug_unmap_alignment - 1 cannot be unmapped.  But the difference is
not properly handled in the current code.

So this prohibits such unusual setting.
Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Acked-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 9ed8d3dc
......@@ -3413,9 +3413,10 @@ static int __init scsi_debug_init(void)
clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
if (scsi_debug_unmap_alignment &&
scsi_debug_unmap_granularity < scsi_debug_unmap_alignment) {
scsi_debug_unmap_granularity <=
scsi_debug_unmap_alignment) {
printk(KERN_ERR
"%s: ERR: unmap_granularity < unmap_alignment\n",
"%s: ERR: unmap_granularity <= unmap_alignment\n",
__func__);
return -EINVAL;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment