vxge: Check if FCS stripping is disabled by the firmware.

- Added a function to check if FCS stripping is disabled by the firmware, if
  it is not disabled fail driver load.

- By default FCS stripping is disabled by the firmware. With this assumption
  driver decrements the indicated packet length by 4 bytes(FCS length).

- This patch ensures that FCS stripping is disabled during driver load time.

Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/vxge/vxge-main.c b/drivers/net/vxge/vxge-main.c
index 7a851ac30c60..04ac4b6cf83a 100644
--- a/drivers/net/vxge/vxge-main.c
+++ b/drivers/net/vxge/vxge-main.c
@@ -4244,6 +4244,15 @@ vxge_probe(struct pci_dev *pdev, const struct pci_device_id *pre)
                         goto _exit3;
         }
 
+        /* if FCS stripping is not disabled in MAC fail driver load */
+        if (vxge_hw_vpath_strip_fcs_check(hldev, vpath_mask) != VXGE_HW_OK) {
+                vxge_debug_init(VXGE_ERR,
+                        "%s: FCS stripping is not disabled in MAC"
+                        " failing driver load", VXGE_DRIVER_NAME);
+                ret = -EINVAL;
+                goto _exit4;
+        }
+
         vxge_hw_device_debug_set(hldev, VXGE_ERR, VXGE_COMPONENT_LL);
 
         /* set private device info */