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authorjogo <jogo@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-10-08 11:37:14 +0000
committerjogo <jogo@3c298f89-4303-0410-b956-a3cf2f4a3e73>2011-10-08 11:37:14 +0000
commitd066413d5de6c091b9cbebe1c881066c85b58032 (patch)
tree0a323f2e0138faa47bb19400723dd7efe79e5022 /target/linux/ar71xx/files/drivers
parent14808c9174a877341a287fb621cae33c82756d72 (diff)
ag71xx: close a race between the phy state machine and link state
A fast stop/start cycle could leave the ag71xx interrupts and tx engine disabled when using a phy driver with a fixed link and the start/stop happens between two phy state machine polls. Prevent this by always forcing the link down on stop regardless of phy state and having a phy connected. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28380 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/files/drivers')
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
index 75500277f..85f17b9fe 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_phy.c
@@ -59,15 +59,19 @@ void ag71xx_phy_start(struct ag71xx *ag)
void ag71xx_phy_stop(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+ unsigned long flags;
- if (ag->phy_dev) {
+ if (ag->phy_dev)
phy_stop(ag->phy_dev);
- } else {
- if (pdata->has_ar7240_switch)
+ else if (pdata->has_ar7240_switch)
ag71xx_ar7240_stop(ag);
+
+ spin_lock_irqsave(&ag->lock, flags);
+ if (ag->link) {
ag->link = 0;
ag71xx_link_adjust(ag);
}
+ spin_unlock_irqrestore(&ag->lock, flags);
}
static int ag71xx_phy_connect_fixed(struct ag71xx *ag)