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Wed, 24 Nov 2021 02:25:34 -0800 (PST) Received: from google.com ([2401:fa00:1:10:104b:13b9:d53:e2aa]) by smtp.gmail.com with ESMTPSA id q9sm11522330pfj.114.2021.11.24.02.25.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Nov 2021 02:25:34 -0800 (PST) Date: Wed, 24 Nov 2021 18:25:30 +0800 From: Tzung-Bi Shih To: "allen-kh.cheng" Cc: Jassi Brar , Rob Herring , Matthias Brugger , Linux-ALSA , cujomalainey@google.com, Pierre-Louis Bossart , Liam Girdwood , Ranjani Sridharan , Kai Vehmanen , Daniel Baluta , Mark Brown , Jaroslav Kysela , Takashi Iwai , Project_Global_Chrome_Upstream_Group@mediatek.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, sound-open-firmware@alsa-project.org Subject: Re: [PATCH v3 3/3] firmware: mediatek: add adsp ipc protocol interface Message-ID: References: <20211124084514.28002-1-allen-kh.cheng@mediatek.com> <20211124084514.28002-4-allen-kh.cheng@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211124084514.28002-4-allen-kh.cheng@mediatek.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 24, 2021 at 04:45:14PM +0800, allen-kh.cheng wrote: > drivers/firmware/Kconfig | 1 + > drivers/firmware/Makefile | 1 + > drivers/firmware/mediatek/Kconfig | 10 ++ > drivers/firmware/mediatek/Makefile | 2 + > drivers/firmware/mediatek/mtk-adsp-ipc.c | 130 ++++++++++++++++++ > .../linux/firmware/mediatek/mtk-adsp-ipc.h | 72 ++++++++++ > 6 files changed, 216 insertions(+) > create mode 100644 drivers/firmware/mediatek/Kconfig > create mode 100644 drivers/firmware/mediatek/Makefile > create mode 100644 drivers/firmware/mediatek/mtk-adsp-ipc.c > create mode 100644 include/linux/firmware/mediatek/mtk-adsp-ipc.h The patch should move before the 2nd patch in the series as the 2nd patch uses mtk-adsp-ipc.h. > diff --git a/drivers/firmware/mediatek/mtk-adsp-ipc.c b/drivers/firmware/mediatek/mtk-adsp-ipc.c [...] > +int adsp_ipc_send(struct mtk_adsp_ipc *ipc, unsigned int idx, uint32_t op) > +{ > + struct mtk_adsp_chan *dsp_chan = &ipc->chans[idx]; > + struct adsp_mbox_ch_info *ch_info = dsp_chan->ch->con_priv; > + int ret; > + > + if (idx >= MTK_ADSP_MBOX_NUM) > + return -EINVAL; If idx >= MTK_ADSP_MBOX_NUM, the invalid memory access has occurred at beginning of the function. > +static int mtk_adsp_ipc_probe(struct platform_device *pdev) > +{ [...] > + device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent); Why does it need to call device_set_of_node_from_dev()? > + for (i = 0; i < MTK_ADSP_MBOX_NUM; i++) { > + chan_name = kasprintf(GFP_KERNEL, "mbox%d", i); > + if (!chan_name) > + return -ENOMEM; > + > + dsp_chan = &dsp_ipc->chans[i]; > + cl = &dsp_chan->cl; > + cl->dev = dev->parent; > + cl->tx_block = false; > + cl->knows_txdone = false; > + cl->tx_prepare = NULL; > + cl->rx_callback = adsp_ipc_recv; > + > + dsp_chan->ipc = dsp_ipc; > + dsp_chan->idx = i; > + dsp_chan->ch = mbox_request_channel_byname(cl, chan_name); > + if (IS_ERR(dsp_chan->ch)) { > + ret = PTR_ERR(dsp_chan->ch); > + if (ret != -EPROBE_DEFER) > + dev_err(dev, "Failed to request mbox chan %d ret %d\n", > + i, ret); If ret == -EPROBE_DEFER, wouldn't it need to return -EPROBE_DEFER? It doesn't retry later if -EPROBE_DEFER.