[SCSI] libsas: sysfs phy control attributes should not be S_IWUGO

Allowing the phy reset controls to be world-triggerable does not seem like
a terribly good idea because SAS devices can be disrupted (and ATA devices
are really disrupted) by a phy reset.  By default only root should be able
to do things like that.

Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/scsi_transport_sas.c

@@ -1446,10 +1446,10 @@ static int sas_user_scan(struct Scsi_Host *shost, uint channel,
 	SETUP_TEMPLATE(phy_attrs, field, S_IRUGO, i->f->func)
 
 #define SETUP_PHY_ATTRIBUTE_WRONLY(field)				\
-	SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, 1)
+	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, 1)
 
 #define SETUP_OPTIONAL_PHY_ATTRIBUTE_WRONLY(field, func)		\
-	SETUP_TEMPLATE(phy_attrs, field, S_IWUGO, i->f->func)
+	SETUP_TEMPLATE(phy_attrs, field, S_IWUSR, i->f->func)
 
 #define SETUP_END_DEV_ATTRIBUTE(field)					\
 	SETUP_TEMPLATE(end_dev_attrs, field, S_IRUGO, 1)