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skge: set mac address bonding fix

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When bonding does fail over it calls set_mac_address.  When this happens
as the result of another port going down, the phy_mutex that is common to
both ports is held, so it deadlocks. Setting the address doesn't need to do
anything that needs the phy_mutex, it already has the RTNL to protect against
other admin actions.

This change just disables the receiver to avoid any hardware confusion
while address is changing.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2007-03-12 15:16:26 -07:00 committed by Jeff Garzik
parent 8ce5e3e45e
commit 2eb3e621c4
1 changed files with 17 additions and 11 deletions
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28
drivers/net/skge.c
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@ -3275,24 +3275,30 @@ static int skge_set_mac_address(struct net_device *dev, void *p)
struct skge_hw *hw = skge->hw;
unsigned port = skge->port;
const struct sockaddr *addr = p;
u16 ctrl;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
mutex_lock(&hw->phy_mutex);
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
memcpy_toio(hw->regs + B2_MAC_1 + port*8,
dev->dev_addr, ETH_ALEN);
memcpy_toio(hw->regs + B2_MAC_2 + port*8,
dev->dev_addr, ETH_ALEN);
if (hw->chip_id == CHIP_ID_GENESIS)
xm_outaddr(hw, port, XM_SA, dev->dev_addr);
else {
gma_set_addr(hw, port, GM_SRC_ADDR_1L, dev->dev_addr);
gma_set_addr(hw, port, GM_SRC_ADDR_2L, dev->dev_addr);
/* disable Rx */
ctrl = gma_read16(hw, port, GM_GP_CTRL);
gma_write16(hw, port, GM_GP_CTRL, ctrl & ~GM_GPCR_RX_ENA);
memcpy_toio(hw->regs + B2_MAC_1 + port*8, dev->dev_addr, ETH_ALEN);
memcpy_toio(hw->regs + B2_MAC_2 + port*8, dev->dev_addr, ETH_ALEN);
if (netif_running(dev)) {
if (hw->chip_id == CHIP_ID_GENESIS)
xm_outaddr(hw, port, XM_SA, dev->dev_addr);
else {
gma_set_addr(hw, port, GM_SRC_ADDR_1L, dev->dev_addr);
gma_set_addr(hw, port, GM_SRC_ADDR_2L, dev->dev_addr);
}
}
mutex_unlock(&hw->phy_mutex);
gma_write16(hw, port, GM_GP_CTRL, ctrl);
return 0;
}