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authorAkinobu Mita <akinobu.mita@gmail.com>2013-04-16 22:11:55 +0900
committerJames Bottomley <JBottomley@Parallels.com>2013-05-02 15:39:04 -0700
commit9ed8d3dc5b46f86ab9117937bd24427ac10e8de5 (patch)
tree0a09ac5278743d2e3054822770818ed3f93ede73 /drivers/scsi/scsi_debug.c
parent025a1f5029497c12a800a10d4540bf2313413b59 (diff)
[SCSI] scsi_debug: call map_region() and unmap_region() only when needed
If the logical block provisioning is not enabled, map_region() and unmap_region() have no effect and they don't need to be called. So this makes map_region() and unmap_region() to be called only when scsi_debug_lbp() returns true, i.e. logical block provisioning is enabled. While I'm at it, this also removes meaningless non-zero check for scsi_debug_unmap_granularity. Because scsi_debug_unmap_granularity cannot be zero with usual setting: scsi_debug_unmap_granularity is 1 by default, and it can be changed to zero with explicit module parameter setting only when the logical block provisioning is disabled. But it is only meaningful module parameter when the logical block provisioning is enabled. 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>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
-rw-r--r--drivers/scsi/scsi_debug.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 5cda11c07c6..05abf4e153a 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -2089,7 +2089,7 @@ static int resp_write(struct scsi_cmnd *SCpnt, unsigned long long lba,
write_lock_irqsave(&atomic_rw, iflags);
ret = do_device_access(SCpnt, devip, lba, num, 1);
- if (scsi_debug_unmap_granularity)
+ if (scsi_debug_lbp())
map_region(lba, num);
write_unlock_irqrestore(&atomic_rw, iflags);
if (-1 == ret)
@@ -2122,7 +2122,7 @@ static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
write_lock_irqsave(&atomic_rw, iflags);
- if (unmap && scsi_debug_unmap_granularity) {
+ if (unmap && scsi_debug_lbp()) {
unmap_region(lba, num);
goto out;
}
@@ -2146,7 +2146,7 @@ static int resp_write_same(struct scsi_cmnd *scmd, unsigned long long lba,
fake_storep + (lba * scsi_debug_sector_size),
scsi_debug_sector_size);
- if (scsi_debug_unmap_granularity)
+ if (scsi_debug_lbp())
map_region(lba, num);
out:
write_unlock_irqrestore(&atomic_rw, iflags);