linux-kernel - Re: 答复: [PATCH v1] usb: gadget: u_serial: check Null pointer in EP callback

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Message-ID: <CAOf5uw=Cuubyh1m_biK=A43ZhdP5696s9kebXw4i9pdj-9g4dw@mail.gmail.com>
Date: Mon, 19 Aug 2024 11:17:07 +0200
From: Michael Nazzareno Trimarchi <michael@...rulasolutions.com>
To: 胡连勤 <hulianqin@...o.com>
Cc: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>, 
	"quic_prashk@...cinc.com" <quic_prashk@...cinc.com>, 
	"quic_jjohnson@...cinc.com" <quic_jjohnson@...cinc.com>, 
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"opensource.kernel" <opensource.kernel@...o.com>, 
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: 答复: [PATCH v1] usb: gadget: u_serial: check Null pointer in EP callback

HI

On Mon, Aug 19, 2024 at 11:00 AM 胡连勤 <hulianqin@...o.com> wrote:
>
> Hello linux community expert:
>
> >> >> >>I think this has been reported previously, and different patches have been proposed, have you searched the archives?
> >> >> > I haven't seen the patch given below before, I will read it carefully.
> >> >> > I searched for Linux mainline commits before submitting, but I only compared them according to the crash stack information and did not notice the following commit.
> >> >>  I checked the stack trace again. The problem we encountered seems different from the problem reported in the link below, and they are not caused by the same reason.
> >> >>
> >>
> >> >Did you apply the patch? as suggested, is the test moving from one gadget to the other?
> >>  We apply the patch into kernel 5.15 and ran a stress test, and the problem did not recur.
>
> >It means that does not happen again?
>  Yes.
>
> >>  Connect the phone to the PC via a USB cable and run the monkey test (run an apk and click on it at will on the phone interface).
>
> >Yes I know but this monkey test is running a stress test moving from usb storage, to other configfs right?
>  From the crash information, it can be seen that the switch is from mtp mode to vivo industrial mode port (adb+diag+cser_tty+gser_tty+rmnet)
>
If the patch applied fix your problem, I think you are ok. I suggest
even you have an android
kernel to try to be more close to lts version of your kernel in Android

Michael


> Thanks



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Michael Nazzareno Trimarchi
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michael@...rulasolutions.com
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