linux-kernel - Re: [PATCH] HID: sony: fix freeze when inserting ghlive ps3/wii dongles

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Message-ID: <CAJNNDmk7z=aJtx00C+8kpBOk0j_XVOk2fDMG9Xf9Na_ChXM2OA@mail.gmail.com>
Date:   Wed, 9 Jun 2021 20:25:47 -0400
From:   Pascal Giard <pascal.giard@...mtl.ca>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <stable@...r.kernel.org>,
        Daniel Nguyen <daniel.nguyen.1@....etsmtl.ca>
Subject: Re: [PATCH] HID: sony: fix freeze when inserting ghlive ps3/wii dongles

On Sat, Jun 5, 2021 at 2:44 AM Greg KH <gregkh@...uxfoundation.org> wrote:
>
> On Fri, Jun 04, 2021 at 12:10:23PM -0400, Pascal Giard wrote:
> > This commit fixes a freeze on insertion of a Guitar Hero Live PS3/WiiU
> > USB dongle. Indeed, with the current implementation, inserting one of
> > those USB dongles will lead to a hard freeze. I apologize for not
> > catching this earlier, it didn't occur on my old laptop.
> >
> > While the issue was isolated to memory alloc/free, I could not figure
> > out why it causes a freeze. So this patch fixes this issue by
> > simplifying memory allocation and usage.
> >
> > We remind that for the dongle to work properly, a control URB needs to
> > be sent periodically. We used to alloc/free the URB each time this URB
> > needed to be sent.
> >
> > With this patch, the memory for the URB is allocated on the probe, reused
> > for as long as the dongle is plugged in, and freed once the dongle is
> > unplugged.
> >
> > Signed-off-by: Pascal Giard <pascal.giard@...mtl.ca>
> > ---
> >  drivers/hid/hid-sony.c | 98 +++++++++++++++++++++---------------------
> >  1 file changed, 49 insertions(+), 49 deletions(-)
>
> <formletter>
>
> This is not the correct way to submit patches for inclusion in the
> stable kernel tree.  Please read:
>     https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
> for how to do this properly.
>
> </formletter>

Dear Greg,

I apologize for failing to follow the procedure. I had already read
these guidelines, and I actually thought I was following Option 1 :-/

I thought that I had to get my patch merged into next first (patch
against dtor's git) and that by adding stable@ as CC, it would
automatically get considered for inclusion into stable once merged
into Linus' tree. Based on your email, I got that wrong...

So I sent my patch to the right place BUT my patch should be against
this [1] tree instead?

Thank you for your patience,

-Pascal
[1] git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git