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 <pakki...@umn.edu>
---
 drivers/iio/adc/xilinx-xadc-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/xilinx-xadc-core.c 
b/drivers/iio/adc/xilinx-xadc-core.c
index 3f6be5ac049a..b13c61539d46 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -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 */
-- 
2.17.1

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