linux-kernel - Re: [RFC PATCH 05/12] media: iris: Skip destroying internal buffer if not dequeued

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Message-ID: <aevtzaqo3pqi5kwufdwciocybibuketxlfy6revxc6r6bzxdai@njgt56fev2vq>
Date: Wed, 5 Mar 2025 22:44:12 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Dikshita Agarwal <quic_dikshita@...cinc.com>
Cc: quic_vgarodia@...cinc.com, quic_abhinavk@...cinc.com, 
	mchehab@...nel.org, hverkuil@...all.nl, linux-media@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 05/12] media: iris: Skip destroying internal buffer
 if not dequeued

On Wed, Mar 05, 2025 at 04:13:28PM +0530, Dikshita Agarwal wrote:
> Firmware might hold the DPB buffers for reference in case of sequence
> change, so skip destroying buffers for which QUEUED flag is not removed.
> 
> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>

Please add FIxes tag and move closer to the top.

> ---
>  drivers/media/platform/qcom/iris/iris_buffer.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/media/platform/qcom/iris/iris_buffer.c b/drivers/media/platform/qcom/iris/iris_buffer.c
> index 8c9d5b7fe75c..305b630ca269 100644
> --- a/drivers/media/platform/qcom/iris/iris_buffer.c
> +++ b/drivers/media/platform/qcom/iris/iris_buffer.c
> @@ -399,6 +399,13 @@ int iris_destroy_internal_buffers(struct iris_inst *inst, u32 plane)
>  	for (i = 0; i < len; i++) {
>  		buffers = &inst->buffers[internal_buf_type[i]];
>  		list_for_each_entry_safe(buf, next, &buffers->list, list) {
> +			/*
> +			 * skip destroying internal(DPB) buffer if firmware
> +			 * did not return it.
> +			 */
> +			if (buf->attr & BUF_ATTR_QUEUED)
> +				continue;
> +
>  			ret = iris_destroy_internal_buffer(inst, buf);
>  			if (ret)
>  				return ret;
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry