Re: crash on getting interrupt from uio_generic_pci

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it's been sent too soon , sorry.
kernel version:
86_64 x86_64 GNU/Linux
[root@localhost devmem2]# uname -a
Linux localhost.localdomain 4.18.16 #4 SMP Thu Nov 21 17:10:34 IST
2019 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost devmem2]#

Thank you for any  ideas,
Ran

On Thu, Nov 21, 2019 at 6:02 PM Ranran <ranshalit@xxxxxxxxx> wrote:
>
> Hello,
>
> I use FPGA with PCIe, and we try to simulate interrupt.
> uio_generic_pci is the kernel pci driver.
>
> On receiving interrupt there is a crash:
>
> I get the following exception:
> What do you want to do today ? [  384.696015] irq 23: nobody cared
> (try booting with the "irqpoll" option)
> [  384.703048] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G           OE
>   4.18.16 #3
> [  384.710799] Hardware name:  /conga-MA5, BIOS MA50R000 10/30/2019
> [  384.717083] Call Trace:
> [  384.719643]  <IRQ>
> [  384.721761]  dump_stack+0x5c/0x80
> [  384.725224]  __report_bad_irq+0x35/0xaf
> [  384.729234]  note_interrupt.cold.9+0xa/0x63
> [  384.733612]  handle_irq_event_percpu+0x68/0x70
> [  384.738239]  handle_irq_event+0x37/0x57
> [  384.742262]  handle_fasteoi_irq+0x97/0x150
> [  384.746560]  handle_irq+0x1a/0x30
> [  384.750021]  do_IRQ+0x44/0xd0
> [  384.753132]  common_interrupt+0xf/0xf
> [  384.756979]  </IRQ>
> [  384.759181] RIP: 0010:cpuidle_enter_state+0x7d/0x220
> [  384.764368] Code: e8 d8 19 45 00 41 89 c4 e8 30 50 b1 ff 65 8b 3d
> 99 db 85 7e e8 a4 4e b1 ff 31 ff 48 89 c3 e8 4a 61 b1 ff fb 66 0f 1f
> 44 00 00 <48> b8 ff ff ff ff f3 01 00 00 4c 29 eb ba ff ff ff 7f 48 89
> d9 48
> [  384.784119] RSP: 0018:ffffb068c06afea8 EFLAGS: 00000286 ORIG_RAX:
> ffffffffffffffda
> [  384.792032] RAX: ffff96977fca14c0 RBX: 0000005991ab33dd RCX: 000000000000001f
> [  384.799495] RDX: 0000005991ab33dd RSI: 0000000000000000 RDI: 0000000000000000
> [  384.806955] RBP: ffff96977fcab300 R08: 000000977b372895 R09: 0000000000000006
> [  384.814446] R10: 00000000ffffffff R11: ffff96977fca05a8 R12: 0000000000000001
> [  384.821900] R13: 0000005991ab220e R14: 0000000000000001 R15: 0000000000000000
> [  384.829346]  ? cpuidle_enter_state+0x76/0x220
> [  384.833886]  do_idle+0x221/0x260
> [  384.837258]  cpu_startup_entry+0x6a/0x70
> [  384.841366]  start_secondary+0x1a4/0x1f0
> [  384.845465]  secondary_startup_64+0xb7/0xc0
> [  384.849849] handlers:
> [  384.852233] [<000000007a5bed83>] uio_interrupt
> [  384.856892] Disabling IRQ #23
>
> kernel version:



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