linux-kernel - Re: [PATCH 02/25] media: iris: Report unreleased PERSIST buffers on session close

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Message-ID: <f2015d66-dcb2-15cb-d32f-3f8cc06b8ed1@quicinc.com>
Date: Wed, 16 Jul 2025 11:36:01 +0530
From: Vikash Garodia <quic_vgarodia@...cinc.com>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>,
        Abhinav Kumar
	<abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil
	<hverkuil@...all.nl>,
        Stefan Schmidt <stefan.schmidt@...aro.org>,
        "Vedang
 Nagar" <quic_vnagar@...cinc.com>
CC: <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 02/25] media: iris: Report unreleased PERSIST buffers on
 session close


On 7/4/2025 1:23 PM, Dikshita Agarwal wrote:
> Add error reporting for unreleased PERSIST internal buffers in
> iris_check_num_queued_internal_buffers(). This ensures all buffer types
> are checked and logged if not freed during session close, helping to
> detect memory leaks and improve driver robustness. No change to buffer
> lifecycle or allocation logic.
> 
> Fixes: d2abb1ff5a3c ("media: iris: Verify internal buffer release on close")
> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
> ---
>  drivers/media/platform/qcom/iris/iris_vidc.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
> index 8285bdaf9466d4bea0f89a3b1943ed7d6c014b7d..96313856a026efaff40da97eaaa63e847172cd57 100644
> --- a/drivers/media/platform/qcom/iris/iris_vidc.c
> +++ b/drivers/media/platform/qcom/iris/iris_vidc.c
> @@ -247,6 +247,14 @@ static void iris_check_num_queued_internal_buffers(struct iris_inst *inst, u32 p
>  			dev_err(inst->core->dev, "%d buffer of type %d not released",
>  				count, internal_buf_type[i]);
>  	}
> +
> +	buffers = &inst->buffers[BUF_PERSIST];
> +
> +	count = 0;
> +	list_for_each_entry_safe(buf, next, &buffers->list, list)
> +		count++;
> +	if (count)
> +		dev_err(inst->core->dev, "%d buffer of type %d not released", count, buf->type);
>  }
>  
>  int iris_close(struct file *filp)
> 

Reviewed-by: Vikash Garodia <quic_vgarodia@...cinc.com>