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PCie Driver crash issue while soft reboot

Mar 04, 2024

Hai,

Currently we are working on Nvidia AGX Xavier with MPSoC connected via PCIe. We have developed a V4l2 based video capture driver and feed the input video from MpSoC.

For testing purpose, we have developed one video capture application based on OpenGl and it was running fine.

After running the OpenGl code, we have rebooted the boot and getting below error,

[ 28.451940] Kernel panic - not syncing: softlockup: hung tasks

[ 28.452049] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G L 4.9.253-t

egra #1

[ 28.452178] Hardware name: DTS V4.6.05, * JetPack_4.6 Emb * Ethernet with F

ixed Link 1Gbps * card Jetson-AGX (DT)

[ 28.452347] Call trace:

[ 28.452397] [] dump_backtrace+0x0/0x198

[ 28.452489] [] show_stack+0x24/0x30

[ 28.452577] [] dump_stack+0xa0/0xc4

[ 28.452667] [] panic+0x12c/0x2a8

[ 28.452754] [] watchdog_unpark_threads+0x0/0x98

[ 28.452859] [] __hrtimer_run_queues+0xd8/0x360

[ 28.452959] [] hrtimer_interrupt+0xa8/0x1e0

[ 28.453167] [] arch_timer_handler_phys+0x38/0x58

[ 28.453645] [] handle_percpu_devid_irq+0x90/0x2b0

[ 28.454118] [] generic_handle_irq+0x34/0x50

[ 28.454539] [] __handle_domain_irq+0x68/0xc0

[ 28.457167] [] gic_handle_irq+0x5c/0xb0

[ 28.462505] [] el1_irq+0xe8/0x194

[ 28.467150] [] irq_exit+0xd0/0x118

[ 28.471961] [] __handle_domain_irq+0x6c/0xc0

[ 28.478080] [] gic_handle_irq+0x5c/0xb0

[ 28.483161] [] el1_irq+0xe8/0x194

[ 28.488235] [] dma_alloc_from_coherent_attr+0x0/0x168

[ 28.494801] [] tegra_pcie_dw_host_init+0x858/0xb28

[ 28.501359] [] dw_pcie_host_init+0x230/0x530

[ 28.507308] [] tegra_pcie_dw_runtime_resume+0x1bc/0x370

[ 28.514396] [] pm_generic_runtime_resume+0x3c/0x58

[ 28.520697] [] __genpd_runtime_resume+0x38/0xa0

[ 28.527083] [] genpd_runtime_resume+0xa4/0x210

[ 28.533031] [] __rpm_callback+0x74/0xa0

[ 28.538456] [] rpm_callback+0x34/0x98

[ 28.543705] [] rpm_resume+0x470/0x710

[ 28.548780] [] __pm_runtime_resume+0x4c/0x70

[ 28.554644] [] tegra_pcie_dw_probe+0x8d8/0xbb0

[ 28.560428] [] platform_drv_probe+0x60/0xc0

[ 28.566024] [] driver_probe_device+0x298/0x448

[ 28.572143] [] __driver_attach+0xdc/0x128

[ 28.577743] [] bus_for_each_dev+0x5c/0xa8

[ 28.583518] [] driver_attach+0x30/0x40

[ 28.588601] [] bus_add_driver+0x20c/0x2a8

[ 28.594198] [] driver_register+0x6c/0x110

[ 28.600232] [] __platform_driver_register+0x5c/0x68

[ 28.606450] [] tegra_pcie_rp_init+0x18/0x20

[ 28.612221] [] do_one_initcall+0x44/0x130

[ 28.618257] [] kernel_init_freeable+0x1a0/0x244

[ 28.624121] [] kernel_init+0x18/0x108

[ 28.629373] [] ret_from_fork+0x10/0x30

[ 28.635147] SMP: stopping secondary CPUs

[ 28.639087] Kernel Offset: disabled

[ 28.642753] Memory Limit: none

It was working fine when the hard reset is given. We are using PCI MSI interrupt in our driver(pci_alloc_irq_vectors and pci_irq_vector). should I free that while driver removal? Can you please tell us what we are missed. Thanks in advance.