ixgbe/igb: catch invalid VF settings

Some ixgbe cards put an invalid VF device ID in the PCIe SR-IOV
capability.  The ixgbe driver is only valid for PFs or non SR-IOV
hardware.  It seems that the same problem could occur on igb hardware as
well, so if we discover we are trying to initialize a VF in ixbge_probe
or igb_probe, print an error and exit.

Based on a patch for ixgbe from Chris Wright <chrisw@sous-sol.org>.

Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Cc: Chris Wright <chrisw@sous-sol.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 3881918..cea37e0 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -1722,6 +1722,15 @@ static int __devinit igb_probe(struct pci_dev *pdev,
        u16 eeprom_apme_mask = IGB_EEPROM_APME;
        u32 part_num;
 
+       /* Catch broken hardware that put the wrong VF device ID in
+        * the PCIe SR-IOV capability.
+        */
+       if (pdev->is_virtfn) {
+               WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
+                    pci_name(pdev), pdev->vendor, pdev->device);
+               return -EINVAL;
+       }
+
        err = pci_enable_device_mem(pdev);
        if (err)
                return err;

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 7b5d976..74d9b6d 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -6492,6 +6492,15 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
 #endif
        u32 part_num, eec;
 
+       /* Catch broken hardware that put the wrong VF device ID in
+        * the PCIe SR-IOV capability.
+        */
+       if (pdev->is_virtfn) {
+               WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
+                    pci_name(pdev), pdev->vendor, pdev->device);
+               return -EINVAL;
+       }
+
        err = pci_enable_device_mem(pdev);
        if (err)
                return err;