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[SCSI] sd: Ensure we correctly disable devices with unknown protection type

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We set the capacity to zero when we discovered a device formatted with
an unknown DIF protection type. However, the read_capacity code would
override the capacity and cause the device to be enabled regardless.

Make sd_read_protection_type() return an error if the protection type is
unknown. Also prevent duplicate printk lines when the device is being
revalidated.

Reported-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Martin K. Petersen
2012-09-21 12:44:12 -04:00
committed by James Bottomley
parent fe0c9610bb
commit fe542396da
2 changed files with 37 additions and 19 deletions
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6
include/scsi/scsi_host.h
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@@ -873,6 +873,9 @@ static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsign
SHOST_DIF_TYPE2_PROTECTION,
SHOST_DIF_TYPE3_PROTECTION };
if (target_type > SHOST_DIF_TYPE3_PROTECTION)
return 0;
return shost->prot_capabilities & cap[target_type] ? target_type : 0;
}
@@ -884,6 +887,9 @@ static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsign
SHOST_DIX_TYPE2_PROTECTION,
SHOST_DIX_TYPE3_PROTECTION };
if (target_type > SHOST_DIX_TYPE3_PROTECTION)
return 0;
return shost->prot_capabilities & cap[target_type];
#endif
return 0;