UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Matt Carlson 2011-01-25 15:58:51 +00:00 committed by David S. Miller
parent 0583d52114
commit f746a3136a
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/net/tg3.c
View File

@ -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);