linux-kernel - Re: [PATCH 1/3] remoteproc/davinci: add the missing retval check for clk

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Date:   Wed, 9 May 2018 14:31:43 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     Ohad Ben-Cohen <ohad@...ery.com>, Sekhar Nori <nsekhar@...com>,
        David Lechner <david@...hnology.com>,
        Suman Anna <s-anna@...com>,
        Aparna Balasubramanian <aparnab@...com>,
        Kevin Hilman <khilman@...nel.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH 1/3] remoteproc/davinci: add the missing retval check for
 clk_enable()

On Wed 02 May 02:56 PDT 2018, Bartosz Golaszewski wrote:

> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> The davinci platform is being switched to using the common clock
> framework, where clk_enable() can fail. Add the return value check.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> Acked-by: Suman Anna <s-anna@...com>
> Reviewed-by: David Lechner <david@...hnology.com>
> Reviewed-by: Sekhar Nori <nsekhar@...com>

Hi Bartosz,

All three patches applied to rproc-next.

Regards,
Bjorn

> ---
>  drivers/remoteproc/da8xx_remoteproc.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
> index bf3b9034c319..2b24291337b7 100644
> --- a/drivers/remoteproc/da8xx_remoteproc.c
> +++ b/drivers/remoteproc/da8xx_remoteproc.c
> @@ -138,6 +138,7 @@ static int da8xx_rproc_start(struct rproc *rproc)
>  	struct device *dev = rproc->dev.parent;
>  	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
>  	struct clk *dsp_clk = drproc->dsp_clk;
> +	int ret;
>  
>  	/* hw requires the start (boot) address be on 1KB boundary */
>  	if (rproc->bootaddr & 0x3ff) {
> @@ -148,7 +149,12 @@ static int da8xx_rproc_start(struct rproc *rproc)
>  
>  	writel(rproc->bootaddr, drproc->bootreg);
>  
> -	clk_enable(dsp_clk);
> +	ret = clk_enable(dsp_clk);
> +	if (ret) {
> +		dev_err(dev, "clk_enable() failed: %d\n", ret);
> +		return ret;
> +	}
> +
>  	davinci_clk_reset_deassert(dsp_clk);
>  
>  	return 0;
> -- 
> 2.17.0
>