From: Jason Gunthorpe Date: Wed, 21 Nov 2012 07:19:06 +0000 (-0700) Subject: ARM: Kirkwood: Update PCI-E fixup X-Git-Tag: v3.2.35~13 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e961f8822e342a846be1b6e0e7c1ec5f18932511;p=karo-tx-linux.git ARM: Kirkwood: Update PCI-E fixup commit 1dc831bf53fddcc6443f74a39e72db5bcea4f15d upstream. - The code relies on rc_pci_fixup being called, which only happens when CONFIG_PCI_QUIRKS is enabled, so add that to Kconfig. Omitting this causes a booting failure with a non-obvious cause. - Update rc_pci_fixup to set the class properly, copying the more modern style from other places - Correct the rc_pci_fixup comment Signed-off-by: Jason Gunthorpe Signed-off-by: Jason Cooper [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 9fdc151b2d02..27bcd12b1056 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -542,6 +542,7 @@ config ARCH_KIRKWOOD bool "Marvell Kirkwood" select CPU_FEROCEON select PCI + select PCI_QUIRKS select ARCH_REQUIRE_GPIOLIB select GENERIC_CLOCKEVENTS select PLAT_ORION diff --git a/arch/arm/mach-kirkwood/pcie.c b/arch/arm/mach-kirkwood/pcie.c index 74b992d810ea..a881c54f5dd1 100644 --- a/arch/arm/mach-kirkwood/pcie.c +++ b/arch/arm/mach-kirkwood/pcie.c @@ -213,14 +213,19 @@ static int __init kirkwood_pcie_setup(int nr, struct pci_sys_data *sys) return 1; } +/* + * The root complex has a hardwired class of PCI_CLASS_MEMORY_OTHER, when it + * is operating as a root complex this needs to be switched to + * PCI_CLASS_BRIDGE_HOST or Linux will errantly try to process the BAR's on + * the device. Decoding setup is handled by the orion code. + */ static void __devinit rc_pci_fixup(struct pci_dev *dev) { - /* - * Prevent enumeration of root complex. - */ if (dev->bus->parent == NULL && dev->devfn == 0) { int i; + dev->class &= 0xff; + dev->class |= PCI_CLASS_BRIDGE_HOST << 8; for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { dev->resource[i].start = 0; dev->resource[i].end = 0;