From 309e57df7b766172ba137a8cbd909f88dd76e8e9 Mon Sep 17 00:00:00 2001
From: Matthew Wilcox <matthew@wil.cx>
Date: Sun, 5 Mar 2006 22:33:34 -0700
Subject: [PATCH] PCI: Provide a boot parameter to disable MSI
Several drivers are starting to grow options to disable MSI. However,
it's often a host chipset issue, not something which individual drivers
should handle. So we add the pci=nomsi kernel parameter to allow the user
to disable MSI modes for systems we haven't added to the quirk list yet.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/pci/pci.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
(limited to 'drivers/pci/pci.c')
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 0bf6d254426..03af2323893 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -900,8 +900,12 @@ static int __devinit pci_setup(char *str)
if (k)
*k++ = 0;
if (*str && (str = pcibios_setup(str)) && *str) {
- /* PCI layer options should be handled here */
- printk(KERN_ERR "PCI: Unknown option `%s'\n", str);
+ if (!strcmp(str, "nomsi")) {
+ pci_no_msi();
+ } else {
+ printk(KERN_ERR "PCI: Unknown option `%s'\n",
+ str);
+ }
}
str = k;
}
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