linux-kernel - Re: [PATCH v3 2/6] staging:iio:ad2s90: Make probe handle spi

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Message-ID: <20181104163834.43dab5fd@archlinux>
Date:   Sun, 4 Nov 2018 16:38:34 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Matheus Tavares <matheus.bernardino@....br>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Hartmut Knaack <knaack.h@....de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, kernel-usp@...glegroups.com
Subject: Re: [PATCH v3 2/6] staging:iio:ad2s90: Make probe handle spi_setup
 failure

On Sat,  3 Nov 2018 19:49:44 -0300
Matheus Tavares <matheus.bernardino@....br> wrote:

> Previously, ad2s90_probe ignored the return code from spi_setup, not
> handling its possible failure. This patch makes ad2s90_probe check if
> the code is an error code and, if so, do the following:
> 
> - Call dev_err with an appropriate error message.
> - Return the spi_setup's error code.
> 
> Note: The 'return ret' statement could be out of the 'if' block, but
> this whole block will be moved up in the function in the patch:
> 'staging:iio:ad2s90: Move device registration to the end of probe'.
> 
> Signed-off-by: Matheus Tavares <matheus.bernardino@....br>
Very nicely presented patch.  Thanks.

Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.

Thanks,

Jonathan

> ---
>  drivers/staging/iio/resolver/ad2s90.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/iio/resolver/ad2s90.c b/drivers/staging/iio/resolver/ad2s90.c
> index ba55de29ef36..4908c8a95fad 100644
> --- a/drivers/staging/iio/resolver/ad2s90.c
> +++ b/drivers/staging/iio/resolver/ad2s90.c
> @@ -86,7 +86,12 @@ static int ad2s90_probe(struct spi_device *spi)
>  	/* need 600ns between CS and the first falling edge of SCLK */
>  	spi->max_speed_hz = 830000;
>  	spi->mode = SPI_MODE_3;
> -	spi_setup(spi);
> +	ret = spi_setup(spi);
> +
> +	if (ret < 0) {
> +		dev_err(&spi->dev, "spi_setup failed!\n");
> +		return ret;
> +	}
>  
>  	return 0;
>  }