On Thu, Dec 01, 2016 at 02:54:50PM +0000, Lorenzo Pieralisi wrote: > On Thu, Dec 01, 2016 at 02:55:49PM +0100, Robert Richter wrote: > > Tomasz, Bjorn, > > > > On 01.12.16 09:49:51, Tomasz Nowicki wrote: > > > I put the picture together here (on top of your pci/ecam branch): > > > [1] https://github.com/semihalf-nowicki-tomasz/linux/commits/pci-quirks-thunderx-v2 > > > > please note that acpi_* functions must be protected with acpi_disabled > > or something else to make sure an acpi enabled kernel does not break > > dt. See the crash below with above branch. > > You could use struct device.of_node, or just move the MCFG check to ACPI > code that probes the root bus in arm64 before calling pci_ecam_create() > which will save you some ifdeffery too while at it. Oh, I like that idea even better! I took the acpi_disabled check back out of acpi_resource_consumer() and moved the call to pci_acpi_setup_ecam_mapping(). Thanks! > > [ 12.493028] Unable to handle kernel NULL pointer dereference at virtual address 00000018 > > [ 12.501113] pgd = ffff0000090a0000 > > [ 12.504511] [00000018] *pgd=0000010fffef0003[ 12.508602] , *pud=0000010fffef0003 > > , *pmd=0000010fffee0003[ 12.514093] , *pte=0000000000000000 > > [ 12.517575] > > [ 12.519064] Internal error: Oops: 96000005 [#1] SMP > > [ 12.523933] Modules linked in: > > [ 12.526987] CPU: 73 PID: 1 Comm: swapper/0 Tainted: G W 4.9.0-rc6.0.vanilla10-00019-g09abd2b6bbeb #135 > > [ 12.537409] Hardware name: Cavium ThunderX CRB/To be filled by O.E.M., BIOS 5.11 12/12/2012 > > [ 12.545748] task: ffff800fe85b8000 task.stack: ffff800ff4288000 > > [ 12.551674] PC is at acpi_ns_walk_namespace+0x68/0x1d4 > > [ 12.556803] LR is at acpi_get_devices+0x6c/0x94 > > ... > > [ 13.124920] [<ffff0000084dc5a0>] acpi_ns_walk_namespace+0x68/0x1d4 > > [ 13.131090] [<ffff0000084dcadc>] acpi_get_devices+0x6c/0x94 > > [ 13.136663] [<ffff0000084c0aec>] acpi_resource_consumer+0x34/0x44 > > [ 13.142752] [<ffff000008496bc0>] pci_ecam_create+0x80/0x228 > > [ 13.148314] [<ffff000008498e64>] pci_host_common_probe+0x294/0x348 > > [ 13.154486] [<ffff00000849bf3c>] thunder_ecam_probe+0x2c/0x38 > > [ 13.160226] [<ffff0000085880b8>] platform_drv_probe+0x60/0xc8 > > [ 13.165970] [<ffff000008585a04>] driver_probe_device+0x26c/0x420 > > [ 13.171966] [<ffff000008585cdc>] __driver_attach+0x124/0x128 > > [ 13.177615] [<ffff000008583238>] bus_for_each_dev+0x70/0xb0 > > [ 13.183177] [<ffff000008585060>] driver_attach+0x30/0x40 > > [ 13.188478] [<ffff000008584a98>] bus_add_driver+0x200/0x2b8 > > [ 13.194041] [<ffff000008586860>] driver_register+0x68/0x100 > > [ 13.199602] [<ffff000008587fdc>] __platform_driver_register+0x54/0x60 > > [ 13.206038] [<ffff000008c39b98>] thunder_ecam_driver_init+0x18/0x20 > > [ 13.212296] [<ffff000008082d94>] do_one_initcall+0x44/0x138 > > [ 13.217862] [<ffff000008c00d0c>] kernel_init_freeable+0x1ac/0x24c > > [ 13.223950] [<ffff0000088605f0>] kernel_init+0x18/0x110 > > [ 13.229165] [<ffff000008082b30>] ret_from_fork+0x10/0x20 -- 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
