scsi_host_dif_capable
dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
if (!scsi_host_dif_capable(sdp->host, sdkp->protection_type)) {
dif = scsi_host_dif_capable(sdp->host, sdkp->protection_type);
dif = scsi_host_dif_capable(sdp->host, type);