linux-kernel - [PATCH 3/6] msi: Fix msi_remove_pci_irq

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Message-ID: <m14pqbq6j1.fsf_-_@ebiederm.dsl.xmission.com>
Date:	Sun, 28 Jan 2007 12:45:54 -0700
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Greg Kroah-Hartman <greg@...ah.com>
Cc:	linux-pci@...ey.karlin.mff.cuni.cz,
	"David S. Miller" <davem@...emloft.net>,
	Kyle McMartin <kyle@...isc-linux.org>,
	<linuxppc-dev@...abs.org>, Brice Goglin <brice@...i.com>,
	<shaohua.li@...el.com>, Michael Ellerman <michael@...erman.id.au>,
	Grant Grundler <grundler@...isc-linux.org>,
	Tony Luck <tony.luck@...el.com>,
	<linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: [PATCH 3/6] msi: Fix msi_remove_pci_irq_vectors.


Since msi_remove_pci_irq_vectors is designed to be called during
hotplug remove it is actively wrong to query the hardware and expect
meaningful results back. 

To that end remove the pci_find_capability calls.  Testing
dev->msi_enabled and dev->msix_enabled gives us all of the information
we need.

Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
---
 drivers/pci/msi.c |    8 ++------
 1 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 5e7a187..db9c1d7 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -865,13 +865,10 @@ void pci_disable_msix(struct pci_dev* dev)
  **/
 void msi_remove_pci_irq_vectors(struct pci_dev* dev)
 {
-	int pos;
-
 	if (!pci_msi_enable || !dev)
  		return;
 
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSI);
-	if (pos > 0 && dev->msi_enabled) {
+	if (dev->msi_enabled) {
 		if (irq_has_action(dev->first_msi_irq)) {
 			printk(KERN_WARNING "PCI: %s: msi_remove_pci_irq_vectors() "
 			       "called without free_irq() on MSI irq %d\n",
@@ -880,8 +877,7 @@ void msi_remove_pci_irq_vectors(struct pci_dev* dev)
 		} else /* Release MSI irq assigned to this device */
 			msi_free_irq(dev, dev->first_msi_irq);
 	}
-	pos = pci_find_capability(dev, PCI_CAP_ID_MSIX);
-	if (pos > 0 && dev->msix_enabled) {
+	if (dev->msix_enabled) {
 		int irq, head, tail = 0, warning = 0;
 		void __iomem *base = NULL;
 
-- 
1.4.4.1.g278f

-
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