netdev - [PATCH] r8169: WakeOnLan fix for the 8168

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Date:	Sat, 25 Jul 2009 00:34:19 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org,
	Jaromír Cápík <tavvva@...ny.cz>,
	Edward Hsu <edward_hsu@...ltek.com.tw>
Subject: [PATCH] r8169: WakeOnLan fix for the 8168

More stuff for http://bugzilla.kernel.org/show_bug.cgi?id=9512

Some 8168 are unable to WoL when receiving is not enabled (plain
old 8169 do not seem to care).

It is not exactly pretty to leave the receiver enabled but we
should now enable DMA late enough for it to be safe. Some late
stage boot failure due to pxe and friends may benefit from the
delayed enabling of bus-mastering as well.

Signed-off-by: Francois Romieu <romieu@...zoreil.com>
Tested-by: Jaromír Cápík <tavvva@...ny.cz>
Cc: Edward Hsu <edward_hsu@...ltek.com.tw>
---
 drivers/net/r8169.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 4b53b58..b82780d 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -2060,8 +2060,6 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		}
 	}
 
-	pci_set_master(pdev);
-
 	/* ioremap MMIO region */
 	ioaddr = ioremap(pci_resource_start(pdev, region), R8169_REGS_SIZE);
 	if (!ioaddr) {
@@ -2089,6 +2087,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	RTL_W16(IntrStatus, 0xffff);
 
+	pci_set_master(pdev);
+
 	/* Identify chip attached to board */
 	rtl8169_get_mac_version(tp, ioaddr);
 
@@ -3874,6 +3874,15 @@ static void rtl_shutdown(struct pci_dev *pdev)
 	spin_unlock_irq(&tp->lock);
 
 	if (system_state == SYSTEM_POWER_OFF) {
+		/* WoL fails with some 8168 when the receiver is disabled. */
+		if (tp->features & RTL_FEATURE_WOL) {
+			pci_clear_master(pdev);
+
+			RTL_W8(ChipCmd, CmdRxEnb);
+			/* PCI commit */
+			RTL_R8(ChipCmd);
+		}
+
 		pci_wake_from_d3(pdev, true);
 		pci_set_power_state(pdev, PCI_D3hot);
 	}
-- 
1.6.2.5

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