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PCI MSI: Fix MSI-X with NIU cards 

The NIU device refuses to allow accesses to MSI-X registers before MSI-X
is enabled.  This patch fixes the problem by moving the read of the mask
register to after MSI-X is enabled.

Reported-by: David S. Miller <davem@davemloft.net>
Tested-by: David S. Miller <davem@davemloft.net>
Reviewed-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Matthew Wilcox 2009-05-08 07:13:33 -06:00 committed by Jesse Barnes
parent 029091df01
commit 8d18101853
1 changed files with 6 additions and 2 deletions
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8
drivers/pci/msi.c
View File

@ -455,8 +455,6 @@ static int msix_capability_init(struct pci_dev *dev,
entry->msi_attrib.default_irq = dev->irq;
entry->msi_attrib.pos = pos;
entry->mask_base = base;
entry->masked = readl(base + j * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
msix_mask_irq(entry, 1);
list_add_tail(&entry->list, &dev->msi_list);
@ -493,6 +491,12 @@ static int msix_capability_init(struct pci_dev *dev,
msix_set_enable(dev, 1);
dev->msix_enabled = 1;
list_for_each_entry(entry, &dev->msi_list, list) {
int vector = entry->msi_attrib.entry_nr;
entry->masked = readl(base + vector * PCI_MSIX_ENTRY_SIZE +
PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
}
return 0;
}