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e100: make sure vlan support isn't advertised on old adapters

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e100 parts don't support vlan offload but they generally do
allow use of vlans in higher software layers via the 8021q module.
That said, there are a couple of really old revisions of e100
hardware that don't even allow the longer frame sizes
required for vlan use with standard MTU.

Use the VLAN_CHALLENGED flag to prevent vlan binding to these
devices.

Reported-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
CC: Michael Tokarev <mjt@tls.msk.ru>
CC: David Lamparter <equinox@diac24.net>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg 2011-10-22 05:18:10 +00:00 committed by Jeff Kirsher
parent 34c9ef8bc6
commit 243559f436
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/intel/e100.c
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@ -2810,6 +2810,10 @@ static int __devinit e100_probe(struct pci_dev *pdev,
e100_get_defaults(nic);
/* D100 MAC doesn't allow rx of vlan packets with normal MTU */
if (nic->mac < mac_82558_D101_A4)
netdev->features |= NETIF_F_VLAN_CHALLENGED;
/* locks must be initialized before calling hw_reset */
spin_lock_init(&nic->cb_lock);
spin_lock_init(&nic->cmd_lock);