Re: 答复: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null

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To: Prashanth K <prashanth.k@xxxxxxxxxxxxxxxx>, 胡连勤 <hulianqin@xxxxxxxx>, "gregkh@xxxxxxxxxxxxxxxxxxx" <gregkh@xxxxxxxxxxxxxxxxxxx>, Dan Carpenter <dan.carpenter@xxxxxxxxxx>, Jon Hunter <jonathanh@xxxxxxxxxx>
Subject: Re: 答复: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
From: Pelle Windestam <pelle@xxxxxxxxxxxx>
Date: Thu, 6 Feb 2025 08:47:30 +0100
Cc: "mwalle@xxxxxxxxxx" <mwalle@xxxxxxxxxx>, "quic_jjohnson@xxxxxxxxxxx" <quic_jjohnson@xxxxxxxxxxx>, David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>, "linux-usb@xxxxxxxxxxxxxxx" <linux-usb@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "opensource.kernel" <opensource.kernel@xxxxxxxx>, "linux-tegra@xxxxxxxxxxxxxxx" <linux-tegra@xxxxxxxxxxxxxxx>, Brad Griffis <bgriffis@xxxxxxxxxx>, Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxx>
In-reply-to: <33a19657-a890-4d59-b7ea-5798cf8f7d9b@oss.qualcomm.com>
References: <TYUPR06MB621733B5AC690DBDF80A0DCCD2042@TYUPR06MB6217.apcprd06.prod.outlook.com> <1037c1ad-9230-4181-b9c3-167dbaa47644@nvidia.com> <2025011633-cavity-earthworm-2b5e@gregkh> <3d9db530-a0b7-4f18-9ad4-233356dfe68c@nvidia.com> <e3a457d6-092b-4b7a-9032-50daddab6f1f@nvidia.com> <0fa6c6db-fd75-4a09-b4fa-d6a98bb8afac@stanley.mountain> <TYUPR06MB621712E6A082791B397088BFD2F72@TYUPR06MB6217.apcprd06.prod.outlook.com> <f264888e-6100-4812-9661-ffad174f45af@windestam.se> <33a19657-a890-4d59-b7ea-5798cf8f7d9b@oss.qualcomm.com>

Are you also using tegra-xudc ? ep_disable routine may be called in an
atomic (interrupt) context.

Nope, I have a board based on a NXP iMX7D CPU, I'm not 100% sure whatthe tegra-xudc equivalent would be for that.


//Pelle

References:
- [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: 胡连勤
- Re: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Jon Hunter
- Re: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: gregkh@xxxxxxxxxxxxxxxxxxx
- Re: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Jon Hunter
- Re: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Jon Hunter
- Re: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Dan Carpenter
- 答复: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: 胡连勤
- Re: 答复: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Pelle Windestam
- Re: 答复: [PATCH v3] usb: gadget: u_serial: Disable ep before setting port to null to fix the crash caused by port being null
  - From: Prashanth K

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