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authorFelix Fietkau <nbd@openwrt.org>2010-07-04 01:31:33 +0000
committerFelix Fietkau <nbd@openwrt.org>2010-07-04 01:31:33 +0000
commit89da22d1eadc7b829add26884954bf7107f13dd6 (patch)
treef6e1c5fa5e106e4b503644335e926c42c8ecb321 /target/linux/ar71xx/files
parentce95b395a2141324f80afba09154a3b3a49f17ab (diff)
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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
Diffstat (limited to 'target/linux/ar71xx/files')
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c6
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);