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

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Message-ID: <20250820-iris-video-encoder-v3-2-80ab0ba58b3d@quicinc.com>
Date: Wed, 20 Aug 2025 14:37:40 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Vikash Garodia <quic_vgarodia@...cinc.com>,
        Abhinav Kumar
	<abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stefan Schmidt
	<stefan.schmidt@...aro.org>,
        Vedang Nagar <quic_vnagar@...cinc.com>,
        "Hans
 Verkuil" <hverkuil@...nel.org>,
        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>,
        Dikshita Agarwal
	<quic_dikshita@...cinc.com>
Subject: [PATCH v3 02/26] media: iris: Report unreleased PERSIST buffers on
 session close

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)

-- 
2.34.1