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

[Supreet Singh <singh.supreet14@gmail.com>]

On Wed, Aug 05, 2026 at 01:28:47PM +0200, Greg Kroah-Hartman wrote:
> 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

Hi Greg

Yes, you are right, the `spidev` change is independent of the switch
statement. My intention was to remove the temporary variable as it was
only used to check the return value of the `spi_new_device()`.

I will drop that change, and send a v2 focused only on the switch
statement. If appropriate I can send that cleanup as a separate patch.

Apologies for the last email, first time using mutt.

Thanks
Supreet Singh