From: Yinghai Lu Date: Sat, 16 Feb 2013 18:58:34 +0000 (-0700) Subject: PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers X-Git-Tag: v3.9-rc1~82^2^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=181380b702eee1a9aca51354d7b87c7b08541fcf;p=pandora-kernel.git PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers Previously, we cached _PRT (PCI routing table, ACPI 5.0 sec 6.2.12) contents and associated each _PRT entry with a PCI bus number. The bus number association means dependencies on PCI device enumeration and bus number assignment, as well as on the PCI/ACPI binding process. After 4f535093cf ("PCI: Put pci_dev in device tree as early as possible"), these dependencies caused the IRQ issues reported by Peter: pci 0000:00:1e.0: PCI bridge to [bus 09] (subtractive decode) pci 0000:00:1e.0: can't derive routing for PCI INT A snd_ctxfi 0000:09:02.0: PCI INT A: no GSI - using ISA IRQ 5 irq 18: nobody cared (try booting with the "irqpoll" option) This patch removes _PRT caching. Instead, we evaluate _PRT as needed in the pci_enable_device() path. This also removes the dependency on PCI bus numbers: we can simply look at the _PRT associated with each bridge as we walk upstream toward the root. [bhelgaas: changelog] Reference: https://bugzilla.kernel.org/show_bug.cgi?id=53561 Reported-and-tested-by: Peter Hurley Suggested-by: Bjorn Helgaas Signed-off-by: Yinghai Lu Signed-off-by: Bjorn Helgaas --- Reading git-diff-tree failed