linux-kernel - [PATCH 0/4] ASoC / rpmsg / remoteproc / soc: qcom: Constify buffer passed to send functions

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Message-Id: <20251130-rpmsg-send-const-v1-0-cb11c7e0a024@oss.qualcomm.com>
Date: Sun, 30 Nov 2025 13:36:07 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Srinivas Kandagatla <srini@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
        linux-sound@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>
Subject: [PATCH 0/4] ASoC / rpmsg / remoteproc / soc: qcom: Constify buffer
 passed to send functions

Dependencies / merging
======================
Entire patchset is one logical chain, all further patches depend on
previous ones, thus everything should be taken via same tree or shared
between trees with tags.  Probably everything should go via ASoC with
necessary acks.

Also, first patch or two patches could be taken now for this merge
window...

Description
===========
The remoteproc and rpmsg send-like functions should not modify data
being sent, so buffer should be marked as pointer to const.  This is not
only self-documenting code but actually increases the actual safety and
clearly documents who is the owner of passed buffer.

Best regards,
Krzysztof

---
Krzysztof Kozlowski (4):
      remoteproc: mtp_scp_ipi: Constify buffer passed to scp_ipi_send()
      remoteproc: mtp_scp: Constify buffer passed to scp_send_ipi()
      rpmsg: Constify buffer passed to send API
      ASoC: qcom:: Constify GPR packet being send over GPR interface

 drivers/remoteproc/mtk_scp.c       |  2 +-
 drivers/remoteproc/mtk_scp_ipi.c   |  2 +-
 drivers/rpmsg/mtk_rpmsg.c          |  4 ++--
 drivers/rpmsg/qcom_glink_native.c  | 13 ++++++++-----
 drivers/rpmsg/qcom_smd.c           | 10 ++++++----
 drivers/rpmsg/rpmsg_core.c         |  8 ++++----
 drivers/rpmsg/rpmsg_internal.h     |  8 ++++----
 drivers/rpmsg/virtio_rpmsg_bus.c   | 24 +++++++++++++-----------
 drivers/soc/qcom/apr.c             |  8 ++++----
 include/linux/remoteproc/mtk_scp.h |  2 +-
 include/linux/rpmsg.h              | 17 +++++++++--------
 include/linux/rpmsg/mtk_rpmsg.h    |  2 +-
 include/linux/soc/qcom/apr.h       |  4 ++--
 sound/soc/qcom/qdsp6/audioreach.c  |  6 +++---
 sound/soc/qcom/qdsp6/audioreach.h  |  4 ++--
 sound/soc/qcom/qdsp6/q6apm.c       |  3 ++-
 sound/soc/qcom/qdsp6/q6apm.h       |  2 +-
 17 files changed, 64 insertions(+), 55 deletions(-)
---
base-commit: 7a9e871ce4c7c8a7d75eaef8407083a0525de2dd
change-id: 20251130-rpmsg-send-const-ae216a1fbd8f

Best regards,
-- 
Krzysztof Kozlowski <krzysztof.kozlowski@....qualcomm.com>