[BNX2]: Disable parallel detect on an HP blade.

Because of some board issues, we need to disable parallel detect on
an HP blade.  Without this patch, the link state can become stuck
when it goes into parallel detect mode.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 14 insertions, 1 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 2fa258050968..35356fba5a71 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -5362,11 +5362,15 @@ bnx2_test_intr(struct bnx2 *bp)
         return -ENODEV;
 }
 
+/* Determining link for parallel detection. */
 static int
 bnx2_5706_serdes_has_link(struct bnx2 *bp)
 {
         u32 mode_ctl, an_dbg, exp;
 
+        if (bp->phy_flags & BNX2_PHY_FLAG_NO_PARALLEL)
+                return 0;
+
         bnx2_write_phy(bp, MII_BNX2_MISC_SHADOW, MISC_SHDW_MODE_CTL);
         bnx2_read_phy(bp, MII_BNX2_MISC_SHADOW, &mode_ctl);
 
@@ -7328,7 +7332,15 @@ bnx2_init_board(struct pci_dev *pdev, struct net_device *dev)
                         bp->flags |= BNX2_FLAG_NO_WOL;
                         bp->wol = 0;
                 }
-                if (CHIP_NUM(bp) != CHIP_NUM_5706) {
+                if (CHIP_NUM(bp) == CHIP_NUM_5706) {
+                        /* Don't do parallel detect on this board because of
+                         * some board problems.  The link will not go down
+                         * if we do parallel detect.
+                         */
+                        if (pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
+                            pdev->subsystem_device == 0x310c)
+                                bp->phy_flags |= BNX2_PHY_FLAG_NO_PARALLEL;
+                } else {
                         bp->phy_addr = 2;
                         if (reg & BNX2_SHARED_HW_CFG_PHY_2_5G)
                                 bp->phy_flags |= BNX2_PHY_FLAG_2_5G_CAPABLE;
diff --git a/drivers/net/bnx2.h b/drivers/net/bnx2.h
index 3aa0364942e2..1eaf5bb3d9c2 100644
--- a/drivers/net/bnx2.h
+++ b/drivers/net/bnx2.h
@@ -6673,6 +6673,7 @@ struct bnx2 {
 #define BNX2_PHY_FLAG_DIS_EARLY_DAC             0x00000400
 #define BNX2_PHY_FLAG_REMOTE_PHY_CAP            0x00000800
 #define BNX2_PHY_FLAG_FORCED_DOWN               0x00001000
+#define BNX2_PHY_FLAG_NO_PARALLEL               0x00002000
 
         u32                     mii_bmcr;
         u32                     mii_bmsr;