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iio: adc: xilinx: check return value of xadc_write_adc_reg 

In function xadc_probe, xadc_write_adc_reg can return an error value
when write fails. The fix checks for the return value consistent with
other invocations of the latter function.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Aditya Pakki 2018-12-27 13:54:52 -06:00 committed by Jonathan Cameron
parent b002bf5f8d
commit 7fc93f3285
1 changed files with 3 additions and 1 deletions
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4
drivers/iio/adc/xilinx-xadc-core.c
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@ -1273,8 +1273,10 @@ static int xadc_probe(struct platform_device *pdev)
xadc->threshold[i] = 0xffff;
else
xadc->threshold[i] = 0;
xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
ret = xadc_write_adc_reg(xadc, XADC_REG_THRESHOLD(i),
xadc->threshold[i]);
if (ret)
goto err_free_irq;
}
/* Go to non-buffered mode */