linux-kernel - Re: [PATCH v3 04/14] spi: Remove code duplication in spi_add

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Message-ID: <20230711173401.kz7or6ucurhoe4er@mercury.elektranox.org>
Date:   Tue, 11 Jul 2023 19:34:01 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
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Subject: Re: [PATCH v3 04/14] spi: Remove code duplication in
 spi_add_device*()

Hi,

On Tue, Jul 11, 2023 at 08:17:46PM +0300, Andy Shevchenko wrote:
> The commit 0c79378c0199 ("spi: add ancillary device support")
> added a dozen of duplicating lines of code. We may move them
> to the __spi_add_device(). Note, that the code may be called
> under the mutex.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Sebastian Reichel <sebastian.reichel@...labora.com>

-- Sebastian

> ---
>  drivers/spi/spi.c | 32 ++++++++++----------------------
>  1 file changed, 10 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 6d74218cf38e..876d40d2c708 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -631,6 +631,16 @@ static int __spi_add_device(struct spi_device *spi)
>  	struct device *dev = ctlr->dev.parent;
>  	int status;
>  
> +	/* Chipselects are numbered 0..max; validate. */
> +	if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) {
> +		dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0),
> +			ctlr->num_chipselect);
> +		return -EINVAL;
> +	}
> +
> +	/* Set the bus ID string */
> +	spi_dev_set_name(spi);
> +
>  	/*
>  	 * We need to make sure there's no other device with this
>  	 * chipselect **BEFORE** we call setup(), else we'll trash
> @@ -689,19 +699,8 @@ static int __spi_add_device(struct spi_device *spi)
>  int spi_add_device(struct spi_device *spi)
>  {
>  	struct spi_controller *ctlr = spi->controller;
> -	struct device *dev = ctlr->dev.parent;
>  	int status;
>  
> -	/* Chipselects are numbered 0..max; validate. */
> -	if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) {
> -		dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0),
> -			ctlr->num_chipselect);
> -		return -EINVAL;
> -	}
> -
> -	/* Set the bus ID string */
> -	spi_dev_set_name(spi);
> -
>  	mutex_lock(&ctlr->add_lock);
>  	status = __spi_add_device(spi);
>  	mutex_unlock(&ctlr->add_lock);
> @@ -712,17 +711,6 @@ EXPORT_SYMBOL_GPL(spi_add_device);
>  static int spi_add_device_locked(struct spi_device *spi)
>  {
>  	struct spi_controller *ctlr = spi->controller;
> -	struct device *dev = ctlr->dev.parent;
> -
> -	/* Chipselects are numbered 0..max; validate. */
> -	if (spi_get_chipselect(spi, 0) >= ctlr->num_chipselect) {
> -		dev_err(dev, "cs%d >= max %d\n", spi_get_chipselect(spi, 0),
> -			ctlr->num_chipselect);
> -		return -EINVAL;
> -	}
> -
> -	/* Set the bus ID string */
> -	spi_dev_set_name(spi);
>  
>  	WARN_ON(!mutex_is_locked(&ctlr->add_lock));
>  	return __spi_add_device(spi);
> -- 
> 2.40.0.1.gaa8946217a0b
> 

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