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via-velocity: Give RX descriptors to the NIC later on open or MTU change

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velocity_open() calls velocity_give_many_rx_descs(), which gives RX
descriptors to the NIC, before installing an interrupt handler or
calling velocity_init_registers().  I think this is very unsafe and it
appears to explain the bug report <http://bugs.debian.org/508527>.

On MTU change, velocity_give_many_rx_descs() is again called before
velocity_init_registers().  I'm not sure whether this is unsafe but
it does look wrong.

Therefore, move the calls to velocity_give_many_rx_descs() after
request_irq() and velocity_init_registers().

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Tested-by: Jan Ceuleers <jan.ceuleers@computer.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2009-12-14 16:05:09 +00:00 committed by David S. Miller
parent b3319b1052
commit 35bb5cadc8
1 changed files with 4 additions and 4 deletions
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8
drivers/net/via-velocity.c
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@ -2237,8 +2237,6 @@ static int velocity_open(struct net_device *dev)
/* Ensure chip is running */
pci_set_power_state(vptr->pdev, PCI_D0);
velocity_give_many_rx_descs(vptr);
velocity_init_registers(vptr, VELOCITY_INIT_COLD);
ret = request_irq(vptr->pdev->irq, velocity_intr, IRQF_SHARED,
@ -2250,6 +2248,8 @@ static int velocity_open(struct net_device *dev)
goto out;
}
velocity_give_many_rx_descs(vptr);
mac_enable_int(vptr->mac_regs);
netif_start_queue(dev);
napi_enable(&vptr->napi);
@ -2339,10 +2339,10 @@ static int velocity_change_mtu(struct net_device *dev, int new_mtu)
dev->mtu = new_mtu;
velocity_give_many_rx_descs(vptr);
velocity_init_registers(vptr, VELOCITY_INIT_COLD);
velocity_give_many_rx_descs(vptr);
mac_enable_int(vptr->mac_regs);
netif_start_queue(dev);