[SCSI] sd: Detach DIF from block integrity infrastructure
So far we have only issued DIF commands if CONFIG_BLK_DEV_INTEGRITY is
enabled. However, communication between initiator and target should be
independent of protection information DMA. There are DIF-only host
adapters coming out that will be able to take advantage of this.
Move the relevant DIF bits to sd.c.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index b62a097..6e728b1 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -798,9 +798,15 @@
static inline unsigned int scsi_host_dif_capable(struct Scsi_Host *shost, unsigned int target_type)
{
switch (target_type) {
- case 1: return shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION;
- case 2: return shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION;
- case 3: return shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION;
+ case 1:
+ if (shost->prot_capabilities & SHOST_DIF_TYPE1_PROTECTION)
+ return target_type;
+ case 2:
+ if (shost->prot_capabilities & SHOST_DIF_TYPE2_PROTECTION)
+ return target_type;
+ case 3:
+ if (shost->prot_capabilities & SHOST_DIF_TYPE3_PROTECTION)
+ return target_type;
}
return 0;
@@ -808,13 +814,14 @@
static inline unsigned int scsi_host_dix_capable(struct Scsi_Host *shost, unsigned int target_type)
{
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
switch (target_type) {
case 0: return shost->prot_capabilities & SHOST_DIX_TYPE0_PROTECTION;
case 1: return shost->prot_capabilities & SHOST_DIX_TYPE1_PROTECTION;
case 2: return shost->prot_capabilities & SHOST_DIX_TYPE2_PROTECTION;
case 3: return shost->prot_capabilities & SHOST_DIX_TYPE3_PROTECTION;
}
-
+#endif
return 0;
}