netdev - [PATCH] ixgb/e: fix IRQx nobody cared for shared irq with INTx

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Message-Id: <200804011720.03569.yhlu.kernel@gmail.com>
Date:	Tue, 1 Apr 2008 17:20:03 -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
Subject: [PATCH] ixgb/e: fix IRQx nobody cared for shared irq with INTx

[PATCH] ixgb/e: fix IRQx nobody cared for shared irq with INTx

solve
	ixgb on pci-x and mptsas on pci-x. sometime mptsas get confused.

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>

Index: linux-2.6/drivers/net/ixgb/ixgb_main.c
===================================================================
--- linux-2.6.orig/drivers/net/ixgb/ixgb_main.c
+++ linux-2.6/drivers/net/ixgb/ixgb_main.c
@@ -290,6 +290,11 @@ ixgb_up(struct ixgb_adapter *adapter)
 #endif
 	ixgb_irq_enable(adapter);
 
+	if (!adapter->have_msi) {
+		/* enable INTx if not using MSI */
+		pci_intx(adapter->pdev, 1);
+	}
+
 	return 0;
 }
 
@@ -368,6 +373,8 @@ ixgb_probe(struct pci_dev *pdev,
 	int i;
 	int err;
 
+	/* disable INTx at first */
+	pci_intx(pdev, 0);
 	if((err = pci_enable_device(pdev)))
 		return err;
 
Index: linux-2.6/drivers/net/ixgbe/ixgbe_main.c
===================================================================
--- linux-2.6.orig/drivers/net/ixgbe/ixgbe_main.c
+++ linux-2.6/drivers/net/ixgbe/ixgbe_main.c
@@ -1988,6 +1988,12 @@ try_intr_reinit:
 	if (err)
 		goto err_up;
 
+	if (!(adapter->flags &
+	      (IXGBE_FLAG_MSI_ENABLED | IXGBE_FLAG_MSIX_ENABLED))) {
+		/* enable INTx if not using MSI/MSIX */
+		pci_intx(adapter->pdev, 1);
+	}
+
 	return 0;
 
 err_up:
@@ -2627,6 +2633,8 @@ static int __devinit ixgbe_probe(struct 
 	u16 link_status, link_speed, link_width;
 	u32 part_num;
 
+	/* disable INTx at first */
+	pci_intx(pdev, 0);
 	err = pci_enable_device(pdev);
 	if (err)
 		return err;
--
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