From: Lihong Yang Date: Wed, 5 Jun 2019 19:45:16 +0000 (-0700) Subject: i40e: Check and set the PF driver state first in i40e_ndo_set_vf_mac X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=80598e6230c7091e8377e97dc8678ca06a936f2a;p=linux.git i40e: Check and set the PF driver state first in i40e_ndo_set_vf_mac The PF driver state flag __I40E_VIRTCHNL_OP_PENDING needs to be checked and set at the beginning of i40e_ndo_set_vf_mac. Otherwise, if there are error conditions before it, the flag will be cleared unexpectedly by this function to cause potential race conditions. Hence move the check to the top of this function. Signed-off-by: Lihong Yang Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index f143678343185..09a7fd4d24e86 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -3943,6 +3943,11 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) int bkt; u8 i; + if (test_and_set_bit(__I40E_VIRTCHNL_OP_PENDING, pf->state)) { + dev_warn(&pf->pdev->dev, "Unable to configure VFs, other operation is pending.\n"); + return -EAGAIN; + } + /* validate the request */ ret = i40e_validate_vf(pf, vf_id); if (ret) @@ -3967,11 +3972,6 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac) goto error_param; } - if (test_and_set_bit(__I40E_VIRTCHNL_OP_PENDING, pf->state)) { - dev_warn(&pf->pdev->dev, "Unable to configure VFs, other operation is pending.\n"); - return -EAGAIN; - } - if (is_multicast_ether_addr(mac)) { dev_err(&pf->pdev->dev, "Invalid Ethernet address %pM for VF %d\n", mac, vf_id);