linux-kernel - [PATCH] r8169: fix IRQx nobody cared for shared irq with INTx

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Message-Id: <200803311458.56119.yhlu.kernel@gmail.com>
Date:	Mon, 31 Mar 2008 14:58:55 -0700
From:	Yinghai Lu <yhlu.kernel.send@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Jeff Garzik <jeff@...zik.org>, Greg KH <greg@...ah.com>,
	Ingo Molnar <mingo@...e.hu>
Cc:	kernel list <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	linux-pci@...ey.karlin.mff.cuni.cz,
	Vadim Dyadkin <dyadkin@....pnpi.spb.ru>
Subject: [PATCH] r8169: fix IRQx nobody cared for shared irq with INTx


try to solve
	troubles with r8169
	http://lkml.org/lkml/2007/8/12/225

same to
	[PATCH] e1000: fix IRQx nobody cared for shared irq with INTx
	http://lkml.org/lkml/2008/3/29/103

Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index 3acfeea..7405a95 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1619,6 +1619,8 @@ rtl8169_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	tp->dev = dev;
 	tp->msg_enable = netif_msg_init(debug.msg_enable, R8169_MSG_DEFAULT);
 
+	/* disable INTx at first */
+	pci_intx(pdev, 0);
 	/* enable device (incl. PCI PM wakeup and hotplug setup) */
 	rc = pci_enable_device(pdev);
 	if (rc < 0) {
@@ -1887,6 +1889,11 @@ static int rtl8169_open(struct net_device *dev)
 	if (retval < 0)
 		goto err_release_ring_2;
 
+	if (!(tp->features & RTL_FEATURE_MSI)) {
+		/* enable INTx if not using MSI */
+		pci_intx(pdev, 1);
+        }
+
 #ifdef CONFIG_R8169_NAPI
 	napi_enable(&tp->napi);
 #endif
--
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