linux-kernel - Re: MSI entry unlinked before arch_teardown_msi

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Message-Id: <20070225.154637.70478886.davem@davemloft.net>
Date:	Sun, 25 Feb 2007 15:46:37 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	ebiederm@...ssion.com
Cc:	linux-kernel@...r.kernel.org
Subject: Re: MSI entry unlinked before arch_teardown_msi_irq().

From: ebiederm@...ssion.com (Eric W. Biederman)
Date: Sun, 25 Feb 2007 02:08:07 -0700

> If that isn't the issue holler and I will look into it a little more.

Talking in code is always more effective :-)

This patch fixes the OOPS I was talking about:

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 68555c1..2f2d92e 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -678,12 +678,14 @@ static int msi_free_irq(struct pci_dev* dev, int irq)
 	}
 	type = entry->msi_attrib.type;
 	entry_nr = entry->msi_attrib.entry_nr;
+
+	arch_teardown_msi_irq(irq);
+
 	head = entry->link.head;
 	base = entry->mask_base;
 	get_irq_msi(entry->link.head)->link.tail = entry->link.tail;
 	get_irq_msi(entry->link.tail)->link.head = entry->link.head;
 
-	arch_teardown_msi_irq(irq);
 	kmem_cache_free(msi_cachep, entry);
 
 	if (type == PCI_CAP_ID_MSIX) {
-
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