bonding: Allow setting and querying xmit policy regardless of mode

From: Wagner Ferenc <wferi@niif.hu>

For consistency with the behaviour of the arp_ip_target option,
let /sys/class/net/bond0/bonding/xmit_hash_policy accept and report
current policy even if the bonding mode in effect does not use it.

Signed-off-by: Ferenc Wagner <wferi@niif.hu>
Acked-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/bonding/bond_sysfs.c

@@ -456,17 +456,11 @@ static ssize_t bonding_show_xmit_hash(struct device *d,
 				      struct device_attribute *attr,
 				      char *buf)
 {
-	int count = 0;
 	struct bonding *bond = to_bond(d);
 
-	if ((bond->params.mode == BOND_MODE_XOR) ||
-	    (bond->params.mode == BOND_MODE_8023AD)) {
-		count = sprintf(buf, "%s %d\n",
-			xmit_hashtype_tbl[bond->params.xmit_policy].modename,
-			bond->params.xmit_policy);
-	}
-
-	return count;
+	return sprintf(buf, "%s %d\n",
+		       xmit_hashtype_tbl[bond->params.xmit_policy].modename,
+		       bond->params.xmit_policy);
 }
 
 static ssize_t bonding_store_xmit_hash(struct device *d,
@@ -484,15 +478,6 @@ static ssize_t bonding_store_xmit_hash(struct device *d,
 		goto out;
 	}
 
-	if ((bond->params.mode != BOND_MODE_XOR) &&
-	    (bond->params.mode != BOND_MODE_8023AD)) {
-		printk(KERN_ERR DRV_NAME
-		       "%s: Transmit hash policy is irrelevant in this mode.\n",
-		       bond->dev->name);
-		ret = -EPERM;
-		goto out;
-	}
-
 	new_value = bond_parse_parm((char *)buf, xmit_hashtype_tbl);
 	if (new_value < 0)  {
 		printk(KERN_ERR DRV_NAME