On 1/18/2019 4:18 PM, Pintu Agarwal wrote:

On Fri, Jan 18, 2019 at 3:54 PM Sai Prakash Ranjan
[off-list ref] wrote:

quoted

Hi Pintu-san,

On 1/18/2019 3:38 PM, Pintu Agarwal wrote:

quoted

Hi All,

Currently, I am trying to debug a boot up crash on some qualcomm
snapdragon arm64 board with kernel 4.9.
I could find the cause of the failure, but I am unable to locate from
which subsystem/drivers this is getting triggered.
If you have any ideas or suggestions to locate the issue, please let me know.

This is the snapshot of crash logs:
[    6.907065] Unable to handle kernel NULL pointer dereference at
virtual address 00000000
[    6.973938] PC is at 0x0
[    6.976503] LR is at __ipipe_ack_fasteoi_irq+0x28/0x38
[    7.151078] Process qmp_aop (pid: 24, stack limit = 0xfffffffbedc18000)
[    7.242668] [<          (null)>]           (null)
[    7.247416] [<ffffff9469f8d2e0>] __ipipe_dispatch_irq+0x78/0x340
[    7.253469] [<ffffff9469e81564>] __ipipe_grab_irq+0x5c/0xd0
[    7.341538] [<ffffff9469e81d68>] gic_handle_irq+0xc0/0x154

[    6.288581] [PINTU]: __ipipe_ack_fasteoi_irq - called
[    6.293698] [PINTU]: __ipipe_ack_fasteoi_irq:
desc->irq_data.chip->irq_hold is NULL

When I check, I found that the irq_hold implementation is missing in
one of the irq_chip driver (expected by ipipe), which I am supposed to
implement.

But I am unable to locate which irq_chip driver.
If there are any good techniques to locate this in kernel, please help.

Could you please tell which QCOM SoC this board is based on?

Snapdragon 845 with kernel 4.9.x
I want to know from which subsystem it is triggered:drivers/soc/qcom/

Irqchip driver is "drivers/irqchip/irq-gic-v3.c". The kernel you are 
using is msm-4.9 I suppose or some other kernel?

- Sai
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

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