diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2009-09-14 08:23:13 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-14 17:03:54 -0700 |
| commit | d314737ad3bad6b4603b243fd6db572385259690 (patch) | |
| tree | aeb1403dff45df771e0c83bad4e7d8c6b8164e50 | |
| parent | 2fb02a26bda1cbc3553164a8358c303d936255c5 (diff) | |
igb: do not allow phy sw reset code to make calls to null pointers
In the case of fiber and serdes adapters we were seeing issues with ethtool
-t causing kernel panics due to null function pointers. To prevent this we
need to exit out of the phy reset code in the event that we do not have a
valid phy.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Don Skidmore <donald.c.skidmore@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/igb/e1000_phy.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/igb/e1000_phy.c b/drivers/net/igb/e1000_phy.c index c1f4da630420..ee460600e74b 100644 --- a/drivers/net/igb/e1000_phy.c +++ b/drivers/net/igb/e1000_phy.c @@ -1565,9 +1565,12 @@ out: **/ s32 igb_phy_sw_reset(struct e1000_hw *hw) { - s32 ret_val; + s32 ret_val = 0; u16 phy_ctrl; + if (!(hw->phy.ops.read_reg)) + goto out; + ret_val = hw->phy.ops.read_reg(hw, PHY_CONTROL, &phy_ctrl); if (ret_val) goto out; |