linux-kernel - Re: [Linux-stm32] [PATCH] spi: spi-stm32-qspi: using pm_runtime_resume_and_get instead of pm_runtime_get

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Date:   Tue, 12 Apr 2022 11:32:53 +0200
From:   Patrice CHOTARD <patrice.chotard@...s.st.com>
To:     <cgel.zte@...il.com>, <broonie@...nel.org>
CC:     Zeal Robot <zealci@....com.cn>, <linux-kernel@...r.kernel.org>,
        Minghao Chi <chi.minghao@....com.cn>,
        <mcoquelin.stm32@...il.com>, <linux-spi@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [Linux-stm32] [PATCH] spi: spi-stm32-qspi: using
 pm_runtime_resume_and_get instead of pm_runtime_get_sync

Hi 

On 4/12/22 09:09, cgel.zte@...il.com wrote:
> From: Minghao Chi <chi.minghao@....com.cn>
> 
> Using pm_runtime_resume_and_get is more appropriate
> for simplifing code
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
> ---
>  drivers/spi/spi-stm32-qspi.c | 30 ++++++++++--------------------
>  1 file changed, 10 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/spi/spi-stm32-qspi.c b/drivers/spi/spi-stm32-qspi.c
> index ffdc55f87e82..b3586521d08e 100644
> --- a/drivers/spi/spi-stm32-qspi.c
> +++ b/drivers/spi/spi-stm32-qspi.c
> @@ -463,11 +463,9 @@ static int stm32_qspi_poll_status(struct spi_mem *mem, const struct spi_mem_op *
>  	if (!spi_mem_supports_op(mem, op))
>  		return -EOPNOTSUPP;
>  
> -	ret = pm_runtime_get_sync(qspi->dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(qspi->dev);
> +	ret = pm_runtime_resume_and_get(qspi->dev);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	mutex_lock(&qspi->lock);
>  
> @@ -490,11 +488,9 @@ static int stm32_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
>  	struct stm32_qspi *qspi = spi_controller_get_devdata(mem->spi->master);
>  	int ret;
>  
> -	ret = pm_runtime_get_sync(qspi->dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(qspi->dev);
> +	ret = pm_runtime_resume_and_get(qspi->dev);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	mutex_lock(&qspi->lock);
>  	if (op->data.dir == SPI_MEM_DATA_IN && op->data.nbytes)
> @@ -536,11 +532,9 @@ static ssize_t stm32_qspi_dirmap_read(struct spi_mem_dirmap_desc *desc,
>  	u32 addr_max;
>  	int ret;
>  
> -	ret = pm_runtime_get_sync(qspi->dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(qspi->dev);
> +	ret = pm_runtime_resume_and_get(qspi->dev);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	mutex_lock(&qspi->lock);
>  	/* make a local copy of desc op_tmpl and complete dirmap rdesc
> @@ -583,11 +577,9 @@ static int stm32_qspi_setup(struct spi_device *spi)
>  	if (!spi->max_speed_hz)
>  		return -EINVAL;
>  
> -	ret = pm_runtime_get_sync(qspi->dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(qspi->dev);
> +	ret = pm_runtime_resume_and_get(qspi->dev);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	presc = DIV_ROUND_UP(qspi->clk_rate, spi->max_speed_hz) - 1;
>  
> @@ -851,11 +843,9 @@ static int __maybe_unused stm32_qspi_resume(struct device *dev)
>  
>  	pinctrl_pm_select_default_state(dev);
>  
> -	ret = pm_runtime_get_sync(dev);
> -	if (ret < 0) {
> -		pm_runtime_put_noidle(dev);
> +	ret = pm_runtime_resume_and_get(dev);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	writel_relaxed(qspi->cr_reg, qspi->io_base + QSPI_CR);
>  	writel_relaxed(qspi->dcr_reg, qspi->io_base + QSPI_DCR);

Reviewed-by: Patrice Chotard <patrice.chotard@...s.st.com>

Thanks
Patrice