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Thu, 25 Jan 2024 08:32:17 +0100 Date: Thu, 25 Jan 2024 08:32:17 +0100 From: Sascha Hauer To: "Peng Fan (OSS)" Cc: Jassi Brar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dong Aisheng , Shawn Guo , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Peng Fan Subject: Re: [PATCH v4 2/4] mailbox: imx: support return value of init Message-ID: <20240125073217.GG324503@pengutronix.de> References: <20240125-imx-mailbox-v4-0-800be5383c20@nxp.com> <20240125-imx-mailbox-v4-2-800be5383c20@nxp.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240125-imx-mailbox-v4-2-800be5383c20@nxp.com> X-Sent-From: Pengutronix Hildesheim X-URL: http://www.pengutronix.de/ X-Accept-Language: de,en X-Accept-Content-Type: text/plain User-Agent: Mutt/1.10.1 (2018-07-13) X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240124_233236_236810_217E171A X-CRM114-Status: GOOD ( 28.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jan 25, 2024 at 01:20:04PM +0800, Peng Fan (OSS) wrote: > From: Peng Fan > > There will be changes that init may fail, so adding return value for > init function. > > Signed-off-by: Peng Fan Reviewed-by: Sascha Hauer Sascha > --- > drivers/mailbox/imx-mailbox.c | 35 ++++++++++++++++++++++++----------- > 1 file changed, 24 insertions(+), 11 deletions(-) > > diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c > index 656171362fe9..dced4614065f 100644 > --- a/drivers/mailbox/imx-mailbox.c > +++ b/drivers/mailbox/imx-mailbox.c > @@ -110,7 +110,7 @@ struct imx_mu_dcfg { > int (*tx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp, void *data); > int (*rx)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp); > int (*rxdb)(struct imx_mu_priv *priv, struct imx_mu_con_priv *cp); > - void (*init)(struct imx_mu_priv *priv); > + int (*init)(struct imx_mu_priv *priv); > enum imx_mu_type type; > u32 xTR; /* Transmit Register0 */ > u32 xRR; /* Receive Register0 */ > @@ -737,7 +737,7 @@ static struct mbox_chan *imx_mu_seco_xlate(struct mbox_controller *mbox, > return imx_mu_xlate(mbox, sp); > } > > -static void imx_mu_init_generic(struct imx_mu_priv *priv) > +static int imx_mu_init_generic(struct imx_mu_priv *priv) > { > unsigned int i; > unsigned int val; > @@ -757,7 +757,7 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv) > priv->mbox.of_xlate = imx_mu_xlate; > > if (priv->side_b) > - return; > + return 0; > > /* Set default MU configuration */ > for (i = 0; i < IMX_MU_xCR_MAX; i++) > @@ -770,9 +770,11 @@ static void imx_mu_init_generic(struct imx_mu_priv *priv) > /* Clear any pending RSR */ > for (i = 0; i < IMX_MU_NUM_RR; i++) > imx_mu_read(priv, priv->dcfg->xRR + (i % 4) * 4); > + > + return 0; > } > > -static void imx_mu_init_specific(struct imx_mu_priv *priv) > +static int imx_mu_init_specific(struct imx_mu_priv *priv) > { > unsigned int i; > int num_chans = priv->dcfg->type & IMX_MU_V2_S4 ? IMX_MU_S4_CHANS : IMX_MU_SCU_CHANS; > @@ -794,12 +796,20 @@ static void imx_mu_init_specific(struct imx_mu_priv *priv) > /* Set default MU configuration */ > for (i = 0; i < IMX_MU_xCR_MAX; i++) > imx_mu_write(priv, 0, priv->dcfg->xCR[i]); > + > + return 0; > } > > -static void imx_mu_init_seco(struct imx_mu_priv *priv) > +static int imx_mu_init_seco(struct imx_mu_priv *priv) > { > - imx_mu_init_generic(priv); > + int ret; > + > + ret = imx_mu_init_generic(priv); > + if (ret) > + return ret; > priv->mbox.of_xlate = imx_mu_seco_xlate; > + > + return 0; > } > > static int imx_mu_probe(struct platform_device *pdev) > @@ -866,7 +876,11 @@ static int imx_mu_probe(struct platform_device *pdev) > > priv->side_b = of_property_read_bool(np, "fsl,mu-side-b"); > > - priv->dcfg->init(priv); > + ret = priv->dcfg->init(priv); > + if (ret) { > + dev_err(dev, "Failed to init MU\n"); > + goto disable_clk; > + } > > spin_lock_init(&priv->xcr_lock); > > @@ -878,10 +892,8 @@ static int imx_mu_probe(struct platform_device *pdev) > platform_set_drvdata(pdev, priv); > > ret = devm_mbox_controller_register(dev, &priv->mbox); > - if (ret) { > - clk_disable_unprepare(priv->clk); > - return ret; > - } > + if (ret) > + goto disable_clk; > > pm_runtime_enable(dev); > > @@ -899,6 +911,7 @@ static int imx_mu_probe(struct platform_device *pdev) > > disable_runtime_pm: > pm_runtime_disable(dev); > +disable_clk: > clk_disable_unprepare(priv->clk); > return ret; > } > > -- > 2.37.1 > > > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel