diff options
| author | Felix Fietkau <nbd@openwrt.org> | 2010-07-04 01:31:33 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2010-07-04 01:31:33 +0000 |
| commit | 89da22d1eadc7b829add26884954bf7107f13dd6 (patch) | |
| tree | f6e1c5fa5e106e4b503644335e926c42c8ecb321 | |
| parent | ce95b395a2141324f80afba09154a3b3a49f17ab (diff) | |
| download | upstream-89da22d1eadc7b829add26884954bf7107f13dd6.tar.gz upstream-89da22d1eadc7b829add26884954bf7107f13dd6.tar.bz2 upstream-89da22d1eadc7b829add26884954bf7107f13dd6.zip | |
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
SVN-Revision: 22054
| -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 a57b6d46fc..9fd41527dd 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); |