Re: [PATCH] staging: greybus: spilib: Handle SPI device types with a switch statement

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Aug 05, 2026 at 04:49:57PM +0530, singh.supreet14@gmail.com wrote:
> From: Supreet <singh.supreet14@gmail.com>

We need a full name please.


> 
> Replaced the if/else chain with switch statement. makes it easier to
> extend support for additional device types.
> 
> Remove the temporary spidev variable since it is only used to test the
> return value of spi_new_device(). Call spi_new_device() directly in
> the conditional instead.
> 
> checkpatch was run, had no warnings and errors.
> 
> Signed-off-by: Supreet <singh.supreet14@gmail.com>
> ---
>  drivers/staging/greybus/spilib.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/staging/greybus/spilib.c b/drivers/staging/greybus/spilib.c
> index e4d1ae8308aa..53fc0c124754 100644
> --- a/drivers/staging/greybus/spilib.c
> +++ b/drivers/staging/greybus/spilib.c
> @@ -444,7 +444,6 @@ static int gb_spi_setup_device(struct gb_spilib *spi, u8 cs)
>  	struct gb_spi_device_config_request request;
>  	struct gb_spi_device_config_response response;
>  	struct spi_board_info spi_board = { {0} };
> -	struct spi_device *spidev;
>  	int ret;
>  	u8 dev_type;
>  
> @@ -458,25 +457,29 @@ static int gb_spi_setup_device(struct gb_spilib *spi, u8 cs)
>  
>  	dev_type = response.device_type;
>  
> -	if (dev_type == GB_SPI_SPI_DEV)
> +	switch (dev_type) {
> +	case GB_SPI_SPI_DEV:
>  		strscpy(spi_board.modalias, "spidev",
>  			sizeof(spi_board.modalias));
> -	else if (dev_type == GB_SPI_SPI_NOR)
> +		break;
> +	case GB_SPI_SPI_NOR:
>  		strscpy(spi_board.modalias, "spi-nor",
>  			sizeof(spi_board.modalias));
> -	else if (dev_type == GB_SPI_SPI_MODALIAS)
> +		break;
> +	case GB_SPI_SPI_MODALIAS:
>  		memcpy(spi_board.modalias, response.name,
> -		       sizeof(spi_board.modalias));
> -	else
> +		sizeof(spi_board.modalias));
> +		break;
> +	default:
>  		return -EINVAL;
> +	}
>  
>  	spi_board.mode		= le16_to_cpu(response.mode);
>  	spi_board.bus_num	= ctlr->bus_num;
>  	spi_board.chip_select	= cs;
>  	spi_board.max_speed_hz	= le32_to_cpu(response.max_speed_hz);
>  
> -	spidev = spi_new_device(ctlr, &spi_board);
> -	if (!spidev)
> +	if (!spi_new_device(ctlr, &spi_board))

Why was this change made?  It's a different one than the switch
statement, right?

thanks,

greg k-h