linux-kernel - [PATCH] msi: Fix the ordering of msix irqs.

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Date:	Thu, 24 May 2007 15:08:21 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	"Mike Miller (OS Dev)" <mikem@...rdog.cca.cpqcorp.net>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, tom.l.nguyen@...el.com,
	iss_storagedev@...com, jens.axboe@...cle.com,
	Michael Ellerman <michael@...erman.id.au>
Subject: [PATCH] msi: Fix the ordering of msix irqs.

Yours looks more complete then my test patch so:

From: "Mike Miller (OS Dev)" <mikem@...rdog.cca.cpqcorp.net> writes:

Found what seems the problem with our vectors being listed backward. In
drivers/pci/msi.c we should be using list_add_tail rather than list_add to
preserve the ordering across various kernels. Please consider this for
inclusion.

Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 0e67723..d74975d 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -333,7 +333,7 @@ static int msi_capability_init(struct pci_dev *dev)
 			msi_mask_bits_reg(pos, is_64bit_address(control)),
 			maskbits);
 	}
-	list_add(&entry->list, &dev->msi_list);
+	list_add_tail(&entry->list, &dev->msi_list);
 
 	/* Configure MSI capability structure */
 	ret = arch_setup_msi_irqs(dev, 1, PCI_CAP_ID_MSI);
@@ -404,7 +404,7 @@ static int msix_capability_init(struct pci_dev *dev,
 		entry->dev = dev;
 		entry->mask_base = base;
 
-		list_add(&entry->list, &dev->msi_list);
+		list_add_tail(&entry->list, &dev->msi_list);
 	}
 
 	ret = arch_setup_msi_irqs(dev, nvec, PCI_CAP_ID_MSIX);
-
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