From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) by kanga.kvack.org (Postfix) with ESMTP id EF0818E0002 for ; Fri, 18 Jan 2019 06:03:45 -0500 (EST) Received: by mail-pf1-f197.google.com with SMTP id f69so9843360pff.5 for ; Fri, 18 Jan 2019 03:03:45 -0800 (PST) Received: from smtp.codeaurora.org (smtp.codeaurora.org. [198.145.29.96]) by mx.google.com with ESMTPS id h36si4327015pgm.200.2019.01.18.03.03.44 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 18 Jan 2019 03:03:44 -0800 (PST) Subject: Re: Need help: how to locate failure from irq_chip subsystem References: From: Sai Prakash Ranjan Message-ID: <57ff3437-47b5-fe92-d576-084ce26aa5d8@codeaurora.org> Date: Fri, 18 Jan 2019 16:33:38 +0530 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Pintu Agarwal Cc: open list , linux-arm-kernel@lists.infradead.org, Russell King - ARM Linux , linux-mm@kvack.org, linux-pm@vger.kernel.org, kernelnewbies@kernelnewbies.org On 1/18/2019 4:18 PM, Pintu Agarwal wrote: > On Fri, Jan 18, 2019 at 3:54 PM Sai Prakash Ranjan > wrote: >> >> Hi Pintu-san, >> >> On 1/18/2019 3:38 PM, Pintu Agarwal wrote: >>> 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] [] __ipipe_dispatch_irq+0x78/0x340 >>> [ 7.253469] [] __ipipe_grab_irq+0x5c/0xd0 >>> [ 7.341538] [] 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