diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2006-03-05 22:33:34 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-03-23 14:35:16 -0800 |
| commit | 309e57df7b766172ba137a8cbd909f88dd76e8e9 (patch) | |
| tree | 74cc85977654925c76c687e597c7586b9e75629b /drivers/pci/msi.c | |
| parent | 5eeca8e688b6affba4cd85262152fdd1b274ad33 (diff) | |
| download | lwn-309e57df7b766172ba137a8cbd909f88dd76e8e9.tar.gz lwn-309e57df7b766172ba137a8cbd909f88dd76e8e9.zip | |
[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>
Diffstat (limited to 'drivers/pci/msi.c')
| -rw-r--r-- | drivers/pci/msi.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index aea8b258b9b8..a77e79c8c82e 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -765,8 +765,11 @@ void pci_disable_msi(struct pci_dev* dev) u16 control; unsigned long flags; + if (!pci_msi_enable) + return; if (!dev) return; + pos = pci_find_capability(dev, PCI_CAP_ID_MSI); if (!pos) return; @@ -1026,6 +1029,8 @@ void pci_disable_msix(struct pci_dev* dev) int pos, temp; u16 control; + if (!pci_msi_enable) + return; if (!dev) return; @@ -1152,6 +1157,11 @@ void msi_remove_pci_irq_vectors(struct pci_dev* dev) } } +void pci_no_msi(void) +{ + pci_msi_enable = 0; +} + EXPORT_SYMBOL(pci_enable_msi); EXPORT_SYMBOL(pci_disable_msi); EXPORT_SYMBOL(pci_enable_msix); |