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[SCSI] scsi_debug: fix false positive logical block reference tag check fail 

Reading partially unwritten sectors generates a false positive logical
block reference tag check failure when DIF is enabled.

This bug is caused by missing ei_lba increment in loop of dif_verify()
when unwritten sector is skipped.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Akinobu Mita 2014-02-26 22:56:58 +09:00 committed by James Bottomley
parent 134997a041
commit c45eabec08
1 changed files with 1 additions and 3 deletions
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4
drivers/scsi/scsi_debug.c
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@ -1832,7 +1832,7 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
struct sd_dif_tuple *sdt;
sector_t sector;
for (i = 0; i < sectors; i++) {
for (i = 0; i < sectors; i++, ei_lba++) {
int ret;
sector = start_sec + i;
@ -1846,8 +1846,6 @@ static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
dif_errors++;
return ret;
}
ei_lba++;
}
dif_copy_prot(SCpnt, start_sec, sectors, true);