https://github.com/torvalds/linux
Revision 38ea72bdb65df2f40ec77b2c9d1413e7f5e34465 authored by Alex Williamson on 18 September 2015, 21:08:54 UTC, committed by Bjorn Helgaas on 24 September 2015, 22:06:32 UTC
SR-IOV creates a virtual bus where bus->self is NULL.  When we add VFs and
scan for an MSI domain, pci_set_bus_msi_domain() dereferences bus->self,
which causes a kernel NULL pointer dereference oops.

Scan up to the parent bus until we find a real bridge where we can get the
MSI domain.

[bhelgaas: changelog]
Fixes: 44aa0c657e3e ("PCI/MSI: Add hooks to populate the msi_domain field")
Tested-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <helgaas@kernel.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
1 parent b838b39
History
Tip revision: 38ea72bdb65df2f40ec77b2c9d1413e7f5e34465 authored by Alex Williamson on 18 September 2015, 21:08:54 UTC
PCI/MSI: Fix MSI IRQ domains for VFs on virtual buses
Tip revision: 38ea72b
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