From 950d12ef6960c49bf6753a4e7b3da01a0694058e Mon Sep 17 00:00:00 2001 From: nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> Date: Sun, 4 Jul 2010 01:31:33 +0000 Subject: ag71xx: fix a memory corruption bug that happens if you flood the interface with packets while it's being brought down fixes boot time crashes under load reported by matteo git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22054 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'target') diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c index a57b6d46f..9fd41527d 100644 --- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c @@ -454,6 +454,12 @@ static void ag71xx_dma_reset(struct ag71xx *ag) ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); + /* + * give the hardware some time to really stop all rx/tx activity + * clearing the descriptors too early causes random memory corruption + */ + mdelay(1); + /* clear descriptor addresses */ ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0); ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0); -- cgit v1.2.3