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path: root/drivers/scsi/sd_dif.c
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Diffstat (limited to 'drivers/scsi/sd_dif.c')
-rw-r--r--drivers/scsi/sd_dif.c37
1 files changed, 20 insertions, 17 deletions
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index 943fde7e7ff..194c7706083 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -311,24 +311,26 @@ void sd_dif_config_host(struct scsi_disk *sdkp)
struct scsi_device *sdp = sdkp->device;
struct gendisk *disk = sdkp->disk;
u8 type = sdkp->protection_type;
+ int dif, dix;
- /* If this HBA doesn't support DIX, resort to normal I/O or DIF */
- if (scsi_host_dix_capable(sdp->host, type) == 0) {
+ dif = scsi_host_dif_capable(sdp->host, type);
+ dix = scsi_host_dix_capable(sdp->host, type);
- if (type == SD_DIF_TYPE0_PROTECTION)
- return;
-
- if (scsi_host_dif_capable(sdp->host, type) == 0) {
- sd_printk(KERN_INFO, sdkp, "Type %d protection " \
- "unsupported by HBA. Disabling DIF.\n", type);
- return;
- }
+ if (!dix && scsi_host_dix_capable(sdp->host, 0)) {
+ dif = 0; dix = 1;
+ }
- sd_printk(KERN_INFO, sdkp, "Enabling DIF Type %d protection\n",
- type);
+ if (type) {
+ if (dif)
+ sd_printk(KERN_INFO, sdkp,
+ "Enabling DIF Type %d protection\n", type);
+ else
+ sd_printk(KERN_INFO, sdkp,
+ "Disabling DIF Type %d protection\n", type);
+ }
+ if (!dix)
return;
- }
/* Enable DMA of protection information */
if (scsi_host_get_guard(sdkp->device->host) & SHOST_DIX_GUARD_IP)
@@ -343,10 +345,10 @@ void sd_dif_config_host(struct scsi_disk *sdkp)
blk_integrity_register(disk, &dif_type1_integrity_crc);
sd_printk(KERN_INFO, sdkp,
- "Enabling %s integrity protection\n", disk->integrity->name);
+ "Enabling DIX %s protection\n", disk->integrity->name);
/* Signal to block layer that we support sector tagging */
- if (type && sdkp->ATO) {
+ if (dif && type && sdkp->ATO) {
if (type == SD_DIF_TYPE3_PROTECTION)
disk->integrity->tag_size = sizeof(u16) + sizeof(u32);
else
@@ -360,7 +362,7 @@ void sd_dif_config_host(struct scsi_disk *sdkp)
/*
* DIF DMA operation magic decoder ring.
*/
-void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix)
+void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix, unsigned int type)
{
int csum_convert, prot_op;
@@ -405,7 +407,8 @@ void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix)
}
scsi_set_prot_op(scmd, prot_op);
- scsi_set_prot_type(scmd, dif);
+ if (dif)
+ scsi_set_prot_type(scmd, type);
}
/*