rtnetlink: clean up SR-IOV config interface

This patch consists of a few minor cleanups to the SR-IOV
configurion code in rtnetlink.
- Remove unneccesary lock
- Remove unneccesary casts
- Return correct error code for no driver support

These changes are based on comments from Patrick McHardy

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 8 deletions

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 42da96a4eeee..4dd4c3cdc442 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -930,10 +930,9 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
         if (tb[IFLA_VF_MAC]) {
                 struct ifla_vf_mac *ivm;
                 ivm = nla_data(tb[IFLA_VF_MAC]);
-                write_lock_bh(&dev_base_lock);
+                err = -EOPNOTSUPP;
                 if (ops->ndo_set_vf_mac)
                         err = ops->ndo_set_vf_mac(dev, ivm->vf, ivm->mac);
-                write_unlock_bh(&dev_base_lock);
                 if (err < 0)
                         goto errout;
                 modified = 1;
@@ -942,12 +941,11 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
         if (tb[IFLA_VF_VLAN]) {
                 struct ifla_vf_vlan *ivv;
                 ivv = nla_data(tb[IFLA_VF_VLAN]);
-                write_lock_bh(&dev_base_lock);
+                err = -EOPNOTSUPP;
                 if (ops->ndo_set_vf_vlan)
                         err = ops->ndo_set_vf_vlan(dev, ivv->vf,
-                                                   (u16)ivv->vlan,
-                                                   (u8)ivv->qos);
-                write_unlock_bh(&dev_base_lock);
+                                                   ivv->vlan,
+                                                   ivv->qos);
                 if (err < 0)
                         goto errout;
                 modified = 1;
@@ -957,10 +955,9 @@ static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm,
         if (tb[IFLA_VF_TX_RATE]) {
                 struct ifla_vf_tx_rate *ivt;
                 ivt = nla_data(tb[IFLA_VF_TX_RATE]);
-                write_lock_bh(&dev_base_lock);
+                err = -EOPNOTSUPP;
                 if (ops->ndo_set_vf_tx_rate)
                         err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, ivt->rate);
-                write_unlock_bh(&dev_base_lock);
                 if (err < 0)
                         goto errout;
                 modified = 1;