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staging:iio:ad2s90: Make probe handle spi_setup failure 

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@usp.br>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matheus Tavares 2018-11-03 19:49:44 -03:00 committed by Jonathan Cameron
parent 070e8c7da1
commit b3a3eafeef
1 changed files with 6 additions and 1 deletions
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7
drivers/staging/iio/resolver/ad2s90.c
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@ -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;
}