scsi_sysfs: add 'is_bin_visible' callback

Add 'is_bin_visible' callback to blank out unsupported vpd pages.
Reviewed-by: NShane Seymour <shane.seymour@hpe.com>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/scsi_sysfs.c

@@ -1023,6 +1023,22 @@ static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj,
 	return attr->mode;
 }
 
+static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj,
+					     struct bin_attribute *attr, int i)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct scsi_device *sdev = to_scsi_device(dev);
+
+
+	if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80)
+		return 0;
+
+	if (attr == &dev_attr_vpd_pg83 && sdev->vpd_pg83)
+		return 0;
+
+	return S_IRUGO;
+}
+
 /* Default template for device attributes.  May NOT be modified */
 static struct attribute *scsi_sdev_attrs[] = {
 	&dev_attr_device_blocked.attr,
@@ -1068,6 +1084,7 @@ static struct attribute_group scsi_sdev_attr_group = {
 	.attrs =	scsi_sdev_attrs,
 	.bin_attrs =	scsi_sdev_bin_attrs,
 	.is_visible =	scsi_sdev_attr_is_visible,
+	.is_bin_visible = scsi_sdev_bin_attr_is_visible,
 };
 
 static const struct attribute_group *scsi_sdev_attr_groups[] = {