diff options
| author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-07-04 01:31:33 +0000 |
|---|---|---|
| committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2010-07-04 01:31:33 +0000 |
| commit | 950d12ef6960c49bf6753a4e7b3da01a0694058e (patch) | |
| tree | 33c15dcefd9ad39cf7955e2c1de6e775bc800e59 | |
| parent | 3e4cfbc540f100ad4a78dbed62448c2e4fdbd3e0 (diff) | |
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
| -rw-r--r-- | target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
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); |