On Mon, Jun 20, 2016 at 09:56:45AM -0700, Tyler Baker wrote: > Hi Bjorn, > > On 6 June 2016 at 16:06, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote: > > Previously we allocated the PCI resource list in > > gen_pci_parse_request_of_pci_ranges(), but if we had an error, we freed it > > on error in gen_pci_init(). > > > > Reorder gen_pci_init() so we can take care of error path cleanup in > > gen_pci_parse_request_of_pci_ranges() instead. > > > > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > > The kernelci.org bot has reported[0] new qemu-aarch64 > (arm64-defconfig) boot failures[1][2] in next-20160620. I've > bisected[3] this boot failure down to this patch, and confirmed > reverting it on top of next-20160620 resolves the boot issue. > > I have not investigated further, but you can easily reproduce[4] the > boot failure on an x86 host running qemu-system-aarch64 (I'm running > qemu-system 2.6). That's most likely because pci_ecam_create() requires the bus_range resource (its busr parameter) to be initialized when it is called and that's not the case after this patch is applied if I read it correctly. It is probably a NULL pointer dereference in pci_ecam_create(). Thanks, Lorenzo > > Cheers, > > Tyler > > [0] https://kernelci.org/boot/all/job/next/kernel/next-20160620/ > [1] https://storage.kernelci.org/next/next-20160620/arm64-defconfig/lab-cambridge/boot-apm-mustang-kvm-guest.txt > [2] https://storage.kernelci.org/next/next-20160620/arm64-defconfig/lab-tbaker/boot-qemu-aarch64,legacy.txt > [3] http://hastebin.com/segiruribu.vbs > [4] http://hastebin.com/dafuzicuyi.avrasm > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html >
