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authorMichael S. Tsirkin <mst@mellanox.co.il>2006-02-14 18:52:22 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-03-23 14:35:14 -0800
commit6e325a62a0a228cd0222783802b53cce04551776 (patch)
tree5609f9e841024ca57ba8ee7a919955c7589444c7 /drivers/pci
parente5548e960f38557825e50806b52cb24c9e730aa2 (diff)
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[PATCH] PCI: make MSI quirk inheritable from the pci bus
It turns out AMD 8131 quirk only affects MSI for devices behind the 8131 bridge. Handle this by adding a flags field in pci_bus, inherited from parent to child. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/msi.c3
-rw-r--r--drivers/pci/probe.c1
-rw-r--r--drivers/pci/quirks.c7
3 files changed, 9 insertions, 2 deletions
diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index d5a67c1bcb98..4de1c17ee573 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -703,6 +703,9 @@ int pci_enable_msi(struct pci_dev* dev)
if (dev->no_msi)
return status;
+ if (dev->bus->bus_flags & PCI_BUS_FLAGS_NO_MSI)
+ return -EINVAL;
+
temp = dev->irq;
status = msi_init();
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3bc0fcd71d03..542e7dfb371b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -347,6 +347,7 @@ pci_alloc_child_bus(struct pci_bus *parent, struct pci_dev *bridge, int busnr)
child->parent = parent;
child->ops = parent->ops;
child->sysdata = parent->sysdata;
+ child->bus_flags = parent->bus_flags;
child->bridge = get_device(&bridge->dev);
child->class_dev.class = &pcibus_class;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d71c31df7fdf..4970f47be72c 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -575,8 +575,11 @@ static void __init quirk_amd_8131_ioapic(struct pci_dev *dev)
{
unsigned char revid, tmp;
- pci_msi_quirk = 1;
- printk(KERN_WARNING "PCI: MSI quirk detected. pci_msi_quirk set.\n");
+ if (dev->subordinate) {
+ printk(KERN_WARNING "PCI: MSI quirk detected. "
+ "PCI_BUS_FLAGS_NO_MSI set for subordinate bus.\n");
+ dev->subordinate->bus_flags |= PCI_BUS_FLAGS_NO_MSI;
+ }
if (nr_ioapics == 0)
return;