e1000e: Fix error path in link detection

commit c4c40e51f9c32c6dd8adf606624c930a1c4d9bbb upstream.

In case of error from e1e_rphy(), the loop will exit early and "success"
will be set to true erroneously.

Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/intel/e1000e/phy.c b/drivers/net/ethernet/intel/e1000e/phy.c
index de13aea..8e674a0 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/phy.c
+++ b/drivers/net/ethernet/intel/e1000e/phy.c
@@ -1744,6 +1744,7 @@ s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
        s32 ret_val = 0;
        u16 i, phy_status;
 
+       *success = false;
        for (i = 0; i < iterations; i++) {
                /* Some PHYs require the MII_BMSR register to be read
                 * twice due to the link bit being sticky.  No harm doing
@@ -1763,16 +1764,16 @@ s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
                ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
                if (ret_val)
                        break;
-               if (phy_status & BMSR_LSTATUS)
+               if (phy_status & BMSR_LSTATUS) {
+                       *success = true;
                        break;
+               }
                if (usec_interval >= 1000)
                        msleep(usec_interval / 1000);
                else
                        udelay(usec_interval);
        }
 
-       *success = (i < iterations);
-
        return ret_val;
 }