linux-kernel - Re: [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU was not signaled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <6c56de481d7060b759d67417e9fa6383f6e2f418.camel@mediatek.com>
Date:   Fri, 6 Aug 2021 06:50:37 +0000
From:   Irui Wang (王瑞) <Irui.Wang@...iatek.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "dafna.hirschfeld@...labora.com" <dafna.hirschfeld@...labora.com>
CC:     "dafna3@...il.com" <dafna3@...il.com>,
        "tfiga@...omium.org" <tfiga@...omium.org>,
        Tiffany Lin (林慧珊) 
        <tiffany.lin@...iatek.com>,
        "eizan@...omium.org" <eizan@...omium.org>,
        Maoguang Meng (孟毛广) 
        <Maoguang.Meng@...iatek.com>,
        "kernel@...labora.com" <kernel@...labora.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "hverkuil@...all.nl" <hverkuil@...all.nl>,
        Yunfei Dong (董云飞) 
        <Yunfei.Dong@...iatek.com>,
        Yong Wu (吴勇) <Yong.Wu@...iatek.com>,
        Irui Wang (王瑞) <Irui.Wang@...iatek.com>,
        "hsinyi@...omium.org" <hsinyi@...omium.org>,
        "matthias.bgg@...il.com" <matthias.bgg@...il.com>,
        Andrew-CT Chen (陳智迪) 
        <Andrew-CT.Chen@...iatek.com>,
        "acourbot@...omium.org" <acourbot@...omium.org>
Subject: Re: [PATCH 5/5] media: mtk-vcodec: venc: Fail if a msg sent to VPU
 was not signaled

On Wed, 2021-08-04 at 16:27 +0200, Dafna Hirschfeld wrote:
> Each message sent to the VPU should raise a signal. The signal
> handler sets vpu->signaled. Test the field and fail
> if it is 0.

I suppose you want to handle the message execution result, if ipi
message can't send or acked successfully, the returned "status" of
"mtk_vcodec_fw_ipi_send" will return, so I think you don't need to
check "signaled" again.

> 
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
> ---
>  drivers/media/platform/mtk-vcodec/venc_vpu_if.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
> b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
> index 234705ba7cd6..8331b1bd1971 100644
> --- a/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
> +++ b/drivers/media/platform/mtk-vcodec/venc_vpu_if.c
> @@ -92,6 +92,7 @@ static int vpu_enc_send_msg(struct venc_vpu_inst
> *vpu, void *msg,
>  {
>  	int status;
>  
> +	vpu->signaled = 0;
>  	mtk_vcodec_debug_enter(vpu);
>  
>  	if (!vpu->ctx->dev->fw_handler) {
> @@ -106,6 +107,8 @@ static int vpu_enc_send_msg(struct venc_vpu_inst
> *vpu, void *msg,
>  			       *(uint32_t *)msg, len, status);
>  		return -EINVAL;
>  	}
> +	if (!vpu->signaled)
> +		return -EINVAL;
>  	if (vpu->failure)
>  		return -EINVAL;
>  
> @@ -122,7 +125,6 @@ int vpu_enc_init(struct venc_vpu_inst *vpu)
>  	mtk_vcodec_debug_enter(vpu);
>  
>  	init_waitqueue_head(&vpu->wq_hd);
> -	vpu->signaled = 0;
>  	vpu->failure = 0;
>  
>  	status = mtk_vcodec_fw_ipi_register(vpu->ctx->dev->fw_handler,
> vpu->id,