linux-kernel - Re: [PATCH v2 3/3] rpmsg: virtio: Fix the unregistration of the device rpmsg

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Message-ID: <CANLsYkx7fB1O001cPLZbidDLmWyobb2zmhEX23naef7kb-RcAw@mail.gmail.com>
Date:   Wed, 27 Apr 2022 08:37:42 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Hangyu Hua <hbh25y@...il.com>
Cc:     bjorn.andersson@...aro.org, arnaud.pouliquen@...s.st.com,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] rpmsg: virtio: Fix the unregistration of the
 device rpmsg_ctrl

On Tue, 26 Apr 2022 at 20:50, Hangyu Hua <hbh25y@...il.com> wrote:
>
> On 2022/4/27 00:56, Mathieu Poirier wrote:
> > On Tue, Apr 26, 2022 at 02:05:36PM +0800, Hangyu Hua wrote:
> >> Unregister the rpmsg_ctrl device instead of just freeing the
> >> the virtio_rpmsg_channel structure.
> >> This will properly unregister the device and call
> >> virtio_rpmsg_release_device() that frees the structure.
> >>
> >> Fixes: c486682ae1e2 ("rpmsg: virtio: Register the rpmsg_char device")
> >> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
> >> Cc: Hangyu Hua <hbh25y@...il.com>
> >> Reviewed-by: Hangyu Hua <hbh25y@...il.com>
> >> ---
> >>   drivers/rpmsg/virtio_rpmsg_bus.c | 2 +-
> >>   1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
> >> index 291fc1cfab7f..485e95f506df 100644
> >> --- a/drivers/rpmsg/virtio_rpmsg_bus.c
> >> +++ b/drivers/rpmsg/virtio_rpmsg_bus.c
> >> @@ -862,7 +862,7 @@ static void rpmsg_virtio_del_ctrl_dev(struct rpmsg_device *rpdev_ctrl)
> >>   {
> >>      if (!rpdev_ctrl)
> >>              return;
> >> -    kfree(to_virtio_rpmsg_channel(rpdev_ctrl));
> >> +    device_unregister(&rpdev_ctrl->dev);
> >
> > The author of this patch should have been Arnaud, something I have fixed before
> > applying this set.
> >
> > Thanks,
> > Mathieu
> >
>
> I get it. I'm sorry i thought Signed-off-by and a description in cover
> letter are enough to express. Do i need to do anything else?

I don't.

>
> Thanks,
> Hangyu
> >>   }
> >>
> >>   static int rpmsg_probe(struct virtio_device *vdev)
> >> --
> >> 2.25.1
> >>