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ixgbevf: add spinlocks for MTU change calls

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Protect set_rlpml with mailbox lock to make sure the MTU configuration
is handled properly.

This change resolves an issue where set_rlpml can fail when the VF
interface is brought up:
ixgbevf 0000:03:1d.6: Failed to set MTU at 1500

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Emil Tantilov 2016-08-29 16:39:28 -07:00 committed by Jeff Kirsher
parent ade3ccf9dc
commit 14b22cd982
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
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@ -1810,8 +1810,10 @@ static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
if (hw->mac.type >= ixgbe_mac_X550_vf)
ixgbevf_setup_vfmrqc(adapter);
spin_lock_bh(&adapter->mbx_lock);
/* notify the PF of our intent to use this size of frame */
ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
spin_unlock_bh(&adapter->mbx_lock);
if (ret)
dev_err(&adapter->pdev->dev,
"Failed to set MTU at %d\n", netdev->mtu);
@ -3758,8 +3760,10 @@ static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
if ((new_mtu < 68) || (max_frame > max_possible_frame))
return -EINVAL;
spin_lock_bh(&adapter->mbx_lock);
/* notify the PF of our intent to use this size of frame */
ret = hw->mac.ops.set_rlpml(hw, max_frame);
spin_unlock_bh(&adapter->mbx_lock);
if (ret)
return -EINVAL;