linux-kernel - Re: [PATCH] HID: amd_sfh: Add missing check for dma_alloc

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Message-ID: <CAO-hwJ++Dr94062SPnbqRJ33yJ5qB48--rnGyNQ12d6VvsCRUA@mail.gmail.com>
Date:   Tue, 20 Dec 2022 11:47:11 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Basavaraj Natikar <bnatikar@....com>
Cc:     Jiasheng Jiang <jiasheng@...as.ac.cn>, basavaraj.natikar@....com,
        jikos@...nel.org, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: amd_sfh: Add missing check for dma_alloc_coherent

On Tue, Dec 20, 2022 at 7:53 AM Basavaraj Natikar <bnatikar@....com> wrote:
>
>
> On 12/20/2022 8:19 AM, Jiasheng Jiang wrote:
> > Add check for the return value of the dma_alloc_coherent since
> > it may return NULL pointer if allocation fails.
> >
> > Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
> > Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
> > ---
> >  drivers/hid/amd-sfh-hid/amd_sfh_client.c | 4 ++++
> >  1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> > index 8275bba63611..ab125f79408f 100644
> > --- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> > +++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> > @@ -237,6 +237,10 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
> >               in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
> >                                                                 &cl_data->sensor_dma_addr[i],
> >                                                                 GFP_KERNEL);
> > +             if (!in_data->sensor_virt_addr[i]) {
> > +                     rc = -ENOMEM;
> > +                     goto cleanup;
> > +             }
> >               cl_data->sensor_sts[i] = SENSOR_DISABLED;
> >               cl_data->sensor_requested_cnt[i] = 0;
> >               cl_data->cur_hid_dev = i;
>
> looks good to me.
>
> Acked-by: Basavaraj Natikar <Basavaraj.Natikar@....com>

Thanks.

I have now applied this patch to hid.git branch for-6.2/upstream-fixes.

Cheers,
Benjamin