linux-kernel - Re: [PATCH v3 02/26] media: iris: Report unreleased PERSIST buffers on session close

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Message-ID: <95ffeb62-0a48-4d64-b6c5-e6b4ee932e5a@linaro.org>
Date: Thu, 21 Aug 2025 09:03:36 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>,
 Vikash Garodia <quic_vgarodia@...cinc.com>,
 Abhinav Kumar <abhinav.kumar@...ux.dev>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Stefan Schmidt <stefan.schmidt@...aro.org>,
 Vedang Nagar <quic_vnagar@...cinc.com>, Hans Verkuil <hverkuil@...nel.org>
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, Renjiang Han <quic_renjiang@...cinc.com>,
 Wangao Wang <quic_wangaow@...cinc.com>
Subject: Re: [PATCH v3 02/26] media: iris: Report unreleased PERSIST buffers
 on session close

On 20/08/2025 10:07, 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")
> Reviewed-by: Vikash Garodia <quic_vgarodia@...cinc.com>
> Tested-by: Vikash Garodia <quic_vgarodia@...cinc.com> # X1E80100
> 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 cf150b32d6c2f9c7e1da7abfd5211fdfc469d96f..5fe7699c611583463231a60058d6960b6749edf5 100644
> --- a/drivers/media/platform/qcom/iris/iris_vidc.c
> +++ b/drivers/media/platform/qcom/iris/iris_vidc.c
> @@ -246,6 +246,14 @@ 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 BUF_PERSIST not released", count);
>   }
>   
>   int iris_close(struct file *filp)
> 

I don't think this change warrants a Fixes tag.

Other than that it seems reasonable.