bnx2x: avoid null pointer dereference when enabling SR-IOV

Fixed NULL pointer dereference when dynamically activating SR-IOV after vf
database failed to be allocated in probe stage (for example due to no ARI
support in pci hub).

Signed-off-by: Michal Kalderon <michals@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
index 0216d592d0cee4b080a9d33d7776f632bf639453..2e46c28fc6019a892f7792c6017effe3f7db7063 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
@@ -3114,6 +3114,11 @@ int bnx2x_sriov_configure(struct pci_dev *dev, int num_vfs_param)
 {
        struct bnx2x *bp = netdev_priv(pci_get_drvdata(dev));
 
+       if (!IS_SRIOV(bp)) {
+               BNX2X_ERR("failed to configure SR-IOV since vfdb was not allocated. Check dmesg for errors in probe stage\n");
+               return -EINVAL;
+       }
+
        DP(BNX2X_MSG_IOV, "bnx2x_sriov_configure called with %d, BNX2X_NR_VIRTFN(bp) was %d\n",
           num_vfs_param, BNX2X_NR_VIRTFN(bp));