From fe65e704534de5d0661ebc3466a2b9018945f694 Mon Sep 17 00:00:00 2001 From: Gabriel Paubert Date: Mon, 19 Jan 2009 17:18:09 -0800 Subject: [PATCH] mv643xx_eth: prevent interrupt storm on ifconfig down Contrary to what the docs say, the 'extended interrupt cause' bit in the interrupt cause register (bit 1) appears to not be maskable on at least some of the mv643xx_eth platforms, making writing zeroes to the interrupt mask register but not the extended interrupt mask register insufficient to stop interrupts from occuring. Therefore, also write zeroes to the extended interrupt mask register when shutting down the port. This fixes the interrupt storm seen on the Pegasos board when shutting down the interface. Signed-off-by: Lennert Buytenhek Signed-off-by: David S. Miller --- drivers/net/mv643xx_eth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 8c6979a26d6..5f31bbb614a 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -2212,6 +2212,7 @@ static int mv643xx_eth_stop(struct net_device *dev) struct mv643xx_eth_private *mp = netdev_priv(dev); int i; + wrlp(mp, INT_MASK_EXT, 0x00000000); wrlp(mp, INT_MASK, 0x00000000); rdlp(mp, INT_MASK); -- 2.41.1