diff options
| author | Matt Carlson <mcarlson@broadcom.com> | 2011-02-15 12:51:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-07 15:05:23 -0800 |
| commit | e8d5b85f2cce50980de6d36dad4e81ab44f53bd0 (patch) | |
| tree | 37ee2ca0adca30c6d22f6445025aee74a32584c6 | |
| parent | 7e4c58029f8c42d57b82b670e5e25119d565ae30 (diff) | |
tg3: Restrict phy ioctl access
commit ed199facd070f8e551dc16a2ae1baa01d8d28ed4 upstream.
If management firmware is present and the device is down, the firmware
will assume control of the phy. If a phy access were allowed from the
host, it will collide with firmware phy accesses, resulting in
unpredictable behavior. This patch fixes the problem by disallowing phy
accesses during the problematic condition.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/net/tg3.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c index 6f97b7bbcbf1..dcae19d306fb 100644 --- a/drivers/net/tg3.c +++ b/drivers/net/tg3.c @@ -11165,7 +11165,9 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) break; /* We have no PHY */ - if (tp->phy_flags & TG3_PHYFLG_IS_LOW_POWER) + if ((tp->phy_flags & TG3_PHYFLG_IS_LOW_POWER) || + ((tp->tg3_flags & TG3_FLAG_ENABLE_ASF) && + !netif_running(dev))) return -EAGAIN; spin_lock_bh(&tp->lock); @@ -11181,7 +11183,9 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) if (tp->phy_flags & TG3_PHYFLG_PHY_SERDES) break; /* We have no PHY */ - if (tp->phy_flags & TG3_PHYFLG_IS_LOW_POWER) + if ((tp->phy_flags & TG3_PHYFLG_IS_LOW_POWER) || + ((tp->tg3_flags & TG3_FLAG_ENABLE_ASF) && + !netif_running(dev))) return -EAGAIN; spin_lock_bh(&tp->lock); |