iio: adc: xilinx: Move request_irq before enabling interrupts

Enabling the Interrupts before registering the irq handler is a bad
idea. This patch corrects the same for XADC driver.
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/xilinx-xadc-core.c

@@ -1226,15 +1226,15 @@ static int xadc_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_free_samplerate_trigger;
 
-	ret = xadc->ops->setup(pdev, indio_dev, xadc->irq);
-	if (ret)
-		goto err_clk_disable_unprepare;
-
 	ret = request_irq(xadc->irq, xadc->ops->interrupt_handler, 0,
 			dev_name(&pdev->dev), indio_dev);
 	if (ret)
 		goto err_clk_disable_unprepare;
 
+	ret = xadc->ops->setup(pdev, indio_dev, xadc->irq);
+	if (ret)
+		goto err_free_irq;
+
 	for (i = 0; i < 16; i++)
 		xadc_read_adc_reg(xadc, XADC_REG_THRESHOLD(i),
 			&xadc->threshold[i]);