From: Matt Carlson <mcarlson@broadcom.com>
Date: Wed, 9 Mar 2011 16:58:23 +0000 (+0000)
Subject: tg3: Refine VAux decision process
X-Git-Tag: v2.6.39-rc1~468^2~106
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=683644b74783725971e5ff61618bd932c5361c3f;p=platform%2Fkernel%2Flinux-stable.git

tg3: Refine VAux decision process

In the near future, the VAux switching decision process is going to get
more complicated.  This patch refines and consolidates the existing
algorithm in anticipation of the new scheme.

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

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 73eacbd..159eb23 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -2120,7 +2120,7 @@ out:
 
 static void tg3_frob_aux_power(struct tg3 *tp)
 {
-	struct tg3 *tp_peer = tp;
+	bool need_vaux = false;
 
 	/* The GPIOs do something completely different on 57765. */
 	if ((tp->tg3_flags2 & TG3_FLG2_IS_NIC) == 0 ||
@@ -2128,23 +2128,32 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765)
 		return;
 
-	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 ||
-	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5714 ||
-	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717) {
+	if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5704 ||
+	     GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5714 ||
+	     GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717) &&
+	    tp->pdev_peer != tp->pdev) {
 		struct net_device *dev_peer;
 
 		dev_peer = pci_get_drvdata(tp->pdev_peer);
+
 		/* remove_one() may have been run on the peer. */
-		if (!dev_peer)
-			tp_peer = tp;
-		else
-			tp_peer = netdev_priv(dev_peer);
+		if (dev_peer) {
+			struct tg3 *tp_peer = netdev_priv(dev_peer);
+
+			if (tp_peer->tg3_flags & TG3_FLAG_INIT_COMPLETE)
+				return;
+
+			if ((tp_peer->tg3_flags & TG3_FLAG_WOL_ENABLE) ||
+			    (tp_peer->tg3_flags & TG3_FLAG_ENABLE_ASF))
+				need_vaux = true;
+		}
 	}
 
-	if ((tp->tg3_flags & TG3_FLAG_WOL_ENABLE) != 0 ||
-	    (tp->tg3_flags & TG3_FLAG_ENABLE_ASF) != 0 ||
-	    (tp_peer->tg3_flags & TG3_FLAG_WOL_ENABLE) != 0 ||
-	    (tp_peer->tg3_flags & TG3_FLAG_ENABLE_ASF) != 0) {
+	if ((tp->tg3_flags & TG3_FLAG_WOL_ENABLE) ||
+	    (tp->tg3_flags & TG3_FLAG_ENABLE_ASF))
+		need_vaux = true;
+
+	if (need_vaux) {
 		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5700 ||
 		    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701) {
 			tw32_wait_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
@@ -2174,10 +2183,6 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 			u32 no_gpio2;
 			u32 grc_local_ctrl = 0;
 
-			if (tp_peer != tp &&
-			    (tp_peer->tg3_flags & TG3_FLAG_INIT_COMPLETE) != 0)
-				return;
-
 			/* Workaround to prevent overdrawing Amps. */
 			if (GET_ASIC_REV(tp->pci_chip_rev_id) ==
 			    ASIC_REV_5714) {
@@ -2216,10 +2221,6 @@ static void tg3_frob_aux_power(struct tg3 *tp)
 	} else {
 		if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700 &&
 		    GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5701) {
-			if (tp_peer != tp &&
-			    (tp_peer->tg3_flags & TG3_FLAG_INIT_COMPLETE) != 0)
-				return;
-
 			tw32_wait_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
 				    (GRC_LCLCTRL_GPIO_OE1 |
 				     GRC_LCLCTRL_GPIO_OUTPUT1), 100);