My linux kernel tree
https://git.hedwing.dev/vincenzopalazzo/linux
Vincenzo Palazzo
12a3a3e219
Add a configurable delay to the Rockchip PCIe driver to address crashes that occur on some old devices, such as the Pine64 RockPro64. This issue is affecting the ARM community, but there is no upstream solution for it yet. The crash I worked on is described below. Co-Developed-by: Dan Johansen <strit@manjaro.org> Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com> Crash dump (customized Manjaro kernel before this patch): [ 1.229856] SError Interrupt on CPU4, code 0xbf000002 -- SError [ 1.229860] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.9.9-2.0-MANJARO-ARM #1 [ 1.229862] Hardware name: Pine64 RockPro64 v2.1 (DT) [ 1.229864] pstate: 60000085 (nZCv daIf -PAN -UAO BTYPE=--) [ 1.229866] pc : rockchip_pcie_rd_conf+0xb4/0x270 [ 1.229868] lr : rockchip_pcie_rd_conf+0x1b4/0x270 [ 1.229870] sp : ffff80001004b850 [ 1.229872] x29: ffff80001004b850 x28: 0000000000000001 [ 1.229877] x27: 0000000000000000 x26: ffff00007a795000 [ 1.229882] x25: ffff00007a7910b0 x24: 0000000000000000 [ 1.229887] x23: 0000000000000000 x22: ffff00007b3a4380 [ 1.229891] x21: ffff80001004b8c4 x20: 0000000000000004 [ 1.229895] x19: 0000000000100000 x18: 0000000000000020 [ 1.229900] x17: 0000000000000001 x16: 0000000000000019 [ 1.229904] x15: ffff00007b222fd8 x14: ffffffffffffffff [ 1.229908] x13: ffff00007a79ba1c x12: ffff00007a79b290 [ 1.229912] x11: 0101010101010101 x10: 7f7f7f7f7f7f7f7f [ 1.229917] x9 : ff72646268756463 x8 : 0000000000000391 [ 1.229921] x7 : ffff80001004b880 x6 : 0000000000000001 [ 1.229925] x5 : 0000000000000000 x4 : 0000000000000000 [ 1.229930] x3 : 0000000000c00008 x2 : 000000000080000a [ 1.229934] x1 : 0000000000000000 x0 : ffff800014000000 [ 1.229939] Kernel panic - not syncing: Asynchronous SError Interrupt [ 1.229942] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 5.9.9-2.0-MANJARO-ARM #1 [ 1.229944] Hardware name: Pine64 RockPro64 v2.1 (DT) [ 1.229946] Call trace: [ 1.229948] dump_backtrace+0x0/0x1d0 [ 1.229949] show_stack+0x18/0x24 [ 1.229951] dump_stack+0xc0/0x118 [ 1.229953] panic+0x148/0x320 [ 1.229955] nmi_panic+0x8c/0x90 [ 1.229956] arm64_serror_panic+0x78/0x84 [ 1.229958] do_serror+0x15c/0x160 [ 1.229960] el1_error+0x84/0x100 [ 1.229962] rockchip_pcie_rd_conf+0xb4/0x270 [ 1.229964] pci_bus_read_config_dword+0x6c/0xd0 [ 1.229966] pci_bus_generic_read_dev_vendor_id+0x34/0x1b0 [ 1.229968] pci_scan_single_device+0xa4/0x144 [ 1.229970] pci_scan_slot+0x40/0x12c [ 1.229972] pci_scan_child_bus_extend+0x58/0x34c [ 1.229974] pci_scan_bridge_extend+0x310/0x590 [ 1.229976] pci_scan_child_bus_extend+0x210/0x34c [ 1.229978] pci_scan_root_bus_bridge+0x68/0xdc [ 1.229980] pci_host_probe+0x18/0xc4 [ 1.229981] rockchip_pcie_probe+0x204/0x330 [ 1.229984] platform_drv_probe+0x54/0xb0 [ 1.229985] really_probe+0xe8/0x500 [ 1.229987] driver_probe_device+0xd8/0xf0 [ 1.229989] device_driver_attach+0xc0/0xcc [ 1.229991] __driver_attach+0xa4/0x170 [ 1.229993] bus_for_each_dev+0x70/0xc0 [ 1.229994] driver_attach+0x24/0x30 [ 1.229996] bus_add_driver+0x140/0x234 [ 1.229998] driver_register+0x78/0x130 [ 1.230000] __platform_driver_register+0x4c/0x60 [ 1.230002] rockchip_pcie_driver_init+0x1c/0x28 [ 1.230004] do_one_initcall+0x54/0x1c0 [ 1.230005] do_initcalls+0xf4/0x130 [ 1.230007] kernel_init_freeable+0x144/0x19c [ 1.230009] kernel_init+0x14/0x11c [ 1.230011] ret_from_fork+0x10/0x34 [ 1.230035] SMP: stopping secondary CPUs [ 1.230037] Kernel Offset: disabled [ 1.230039] CPU features: 0x0240022,2100200c [ 1.230041] Memory Limit: none |
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README
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.