[PATCH][Natty] PCI: allow matching of prefetchable resources to non-prefetchable windows

Seth Forshee seth.forshee at canonical.com
Mon May 23 21:36:36 UTC 2011


SRU Justification:

Impact: PCI devices may fail to work due to a resource allocation
failure. When this happens the kernel prints a "address space collision"
message.

Fix: Upstream commit 8c8def26bfaa704db67d515da3eb92cf26067548

Test case: Boot a kernel on an affected machine and observe that the
"address space collision" messages are no longer present. Resources for
the affected devices will appear in /proc/iomem and /proc/ioports with
the patch applied. Verified on LP #424142.




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