Commit cd1f55a5 authored Jan 26, 2009 by Anton Vorontsov Committed by David S. Miller Jan 26, 2009

gianfar: Revive VLAN support



commit 77ecaf2d ("gianfar: Fix VLAN
HW feature related frame/buffer size calculation") wrongly removed
priv->vlgrp assignment, and now priv->vlgrp is always NULL.

This patch fixes the issue, plus fixes following sparse warning
introduced by the same commit:
gianfar.c:1406:13: warning: context imbalance in 'gfar_vlan_rx_register' - wrong count at exit

gfar_vlan_rx_register() checks for "if (old_grp == grp)" and tries
to return w/o dropping the lock.

According to net/8021q/vlan.c VLAN core issues rx_register() callback:
1. In register_vlan_dev() only on a newly created group;
2. In unregister_vlan_dev() only if the group becomes empty.

Thus the check in the gianfar driver isn't needed.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 116cb428

drivers/net/gianfar.c

+1 −5

Original line number	Diff line number	Diff line
		@@ -1423,15 +1423,11 @@ static void gfar_vlan_rx_register(struct net_device *dev,
		{
		struct gfar_private *priv = netdev_priv(dev);
		unsigned long flags;
		struct vlan_group *old_grp;
		u32 tempval;

		spin_lock_irqsave(&priv->rxlock, flags);

		old_grp = priv->vlgrp;

		if (old_grp == grp)
		return;
		priv->vlgrp = grp;

		if (grp) {
		/* Enable VLAN tag insertion */