netdev - [PATCH net-2.6/stable] tg3: Restrict phy ioctl access

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Message-ID: <1297810270-4690-1-git-send-email-mcarlson@broadcom.com>
Date:	Tue, 15 Feb 2011 14:51:10 -0800
From:	"Matt Carlson" <mcarlson@...adcom.com>
To:	davem@...emloft.net
cc:	netdev@...r.kernel.org, mcarlson@...adcom.com, stable@...nel.org
Subject: [PATCH net-2.6/stable] tg3: Restrict phy ioctl access

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.

Upstream commit ID f746a3136a61ae535c5d0b49a9418fa21edc61b5

Signed-off-by: Matt Carlson <mcarlson@...adcom.com>
Reviewed-by: Michael Chan <mchan@...adcom.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
---
 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 93b32d3..06c0e503 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -11158,7 +11158,9 @@ 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);
@@ -11174,7 +11176,9 @@ 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);
-- 
1.7.3.4


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