igb: Fix for issue where values could be too high for udelay function.

This patch changes the igb_phy_has_link function to check the value of the
parameter before deciding to use udelay or mdelay in order to be sure that
the value is not too high for udelay function.

CC: stable kernel <stable@vger.kernel.org> # 3.9+
Signed-off-by: Sunil K Pandey <sunil.k.pandey@intel.com>
Signed-off-by: Kevin B Smith <kevin.b.smith@intel.com>
Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/intel/igb/e1000_phy.c b/drivers/net/ethernet/intel/igb/e1000_phy.c
index c4c4fe332c7ee06af09696cc8e5ba027d6d9ba15..ad2b74d95138c1542bb78a55b7d620e5695f2abb 100644 (file)
--- a/drivers/net/ethernet/intel/igb/e1000_phy.c
+++ b/drivers/net/ethernet/intel/igb/e1000_phy.c
@@ -1728,7 +1728,10 @@ s32 igb_phy_has_link(struct e1000_hw *hw, u32 iterations,
                         * ownership of the resources, wait and try again to
                         * see if they have relinquished the resources yet.
                         */
-                       udelay(usec_interval);
+                       if (usec_interval >= 1000)
+                               mdelay(usec_interval/1000);
+                       else
+                               udelay(usec_interval);
                }
                ret_val = hw->phy.ops.read_reg(hw, PHY_STATUS, &phy_status);
                if (ret_val)