e1000e: refactor PHY ID detection workaround

The workaround that detects the correct PHY ID when an initial read of the
PHY ID registers returns an invalid one should retry up to ten times with
a small delay between attempts using a single PHY address and then repeat
using the remaining possible PHY addresses.  Do this instead of trying each
possible PHY address repeating that up to 100 times.

Signed-off-by: Bruce Allan <bruce.w.allan@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/e1000e/hw.h b/drivers/net/e1000e/hw.h
index 41609d5561ba78155499877bbf1b24ac1351d962..a7d08dae79c482e7ccf8e37f984bad5377c74820 100644 (file)
--- a/drivers/net/e1000e/hw.h
+++ b/drivers/net/e1000e/hw.h
@@ -219,7 +219,7 @@ enum e1e_registers {
        E1000_HICR      = 0x08F00, /* Host Interface Control */
 };
 
-/* RSS registers */
+#define E1000_MAX_PHY_ADDR             4
 
 /* IGP01E1000 Specific Registers */
 #define IGP01E1000_PHY_PORT_CONFIG     0x10 /* Port Config */

diff --git a/drivers/net/e1000e/phy.c b/drivers/net/e1000e/phy.c
index 0c69649af06930d97f737031de5ccf389aa69e01..67a718862e70f82de31467b370b1138aefd00fee 100644 (file)
--- a/drivers/net/e1000e/phy.c
+++ b/drivers/net/e1000e/phy.c
@@ -2197,28 +2197,34 @@ enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
 s32 e1000e_determine_phy_address(struct e1000_hw *hw)
 {
        s32 ret_val = -E1000_ERR_PHY_TYPE;
-       u32 phy_addr= 0;
-       u32 i = 0;
+       u32 phy_addr = 0;
+       u32 i;
        enum e1000_phy_type phy_type = e1000_phy_unknown;
 
-       do {
-               for (phy_addr = 0; phy_addr < 4; phy_addr++) {
-                       hw->phy.addr = phy_addr;
+       hw->phy.id = phy_type;
+
+       for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
+               hw->phy.addr = phy_addr;
+               i = 0;
+
+               do {
                        e1000e_get_phy_id(hw);
                        phy_type = e1000e_get_phy_type_from_id(hw->phy.id);
 
-                       /* 
+                       /*
                         * If phy_type is valid, break - we found our
                         * PHY address
                         */
                        if (phy_type  != e1000_phy_unknown) {
                                ret_val = 0;
-                               break;
+                               goto out;
                        }
-               }
-               i++;
-       } while ((ret_val != 0) && (i < 100));
+                       msleep(1);
+                       i++;
+               } while (i < 10);
+       }
 
+out:
        return ret_val;
 }