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iommu/amd: Fix interrupt remapping for aliased devices

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commit e028a9e6b8 upstream.

An apparent cut and paste error prevents the correct flags from being
set on the alias device resulting in MSI on conventional PCI devices
failing to work.  This also produces error events from the IOMMU like:

AMD-Vi: Event logged [INVALID_DEVICE_REQUEST device=00:14.4 address=0x000000fdf8000000 flags=0x0a00]

Where 14.4 is a PCIe-to-PCI bridge with a device behind it trying to
use MSI interrupts.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Williamson 2014-04-22 10:08:40 -06:00 • committed by Greg Kroah-Hartman
commit 0a4e3565df
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu.c
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@ -3959,7 +3959,7 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
iommu_flush_dte(iommu, devid);
if (devid != alias) {
irq_lookup_table[alias] = table;
set_dte_irq_entry(devid, table);
set_dte_irq_entry(alias, table);
iommu_flush_dte(iommu, alias);
}