[PATCH -next v2 2/3] iio: adc: at91_adc: Use devm_request_irq() helper function

[Jinjie Ruan]

Use devm_request_irq() to request the interrupt, so we can
avoid having to manually clean this up.

Signed-off-by: Jinjie Ruan <ruanjinjie at huawei.com>
---
 drivers/iio/adc/at91_adc.c | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 318e33ce22fb..2ac1b64f0fb7 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1077,11 +1077,13 @@ static int at91_adc_probe(struct platform_device *pdev)
 	at91_adc_writel(st, AT91_ADC_IDR, 0xFFFFFFFF);
 
 	if (st->caps->has_tsmr)
-		ret = request_irq(st->irq, at91_adc_9x5_interrupt, 0,
-				  pdev->dev.driver->name, idev);
+		ret = devm_request_irq(&pdev->dev, st->irq,
+				       at91_adc_9x5_interrupt, 0,
+				       pdev->dev.driver->name, idev);
 	else
-		ret = request_irq(st->irq, at91_adc_rl_interrupt, 0,
-				  pdev->dev.driver->name, idev);
+		ret = devm_request_irq(&pdev->dev, st->irq,
+				       at91_adc_rl_interrupt, 0,
+				       pdev->dev.driver->name, idev);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to allocate IRQ.\n");
 		return ret;
@@ -1092,7 +1094,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev,
 			"Could not prepare or enable the clock.\n");
 		ret = PTR_ERR(st->clk);
-		goto error_free_irq;
+		return ret;
 	}
 
 	st->adc_clk = devm_clk_get_enabled(&pdev->dev, "adc_op_clk");
@@ -1100,7 +1102,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev,
 			"Could not prepare or enable the ADC clock.\n");
 		ret = PTR_ERR(st->adc_clk);
-		goto error_free_irq;
+		return ret;
 	}
 
 	/*
@@ -1119,8 +1121,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 
 	if (!st->startup_time) {
 		dev_err(&pdev->dev, "No startup time available.\n");
-		ret = -EINVAL;
-		goto error_free_irq;
+		return -EINVAL;
 	}
 	ticks = (*st->caps->calc_startup_ticks)(st->startup_time, adc_clk_khz);
 
@@ -1148,7 +1149,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 	ret = at91_adc_channel_init(idev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Couldn't initialize the channels.\n");
-		goto error_free_irq;
+		return ret;
 	}
 
 	init_waitqueue_head(&st->wq_data_avail);
@@ -1163,19 +1164,19 @@ static int at91_adc_probe(struct platform_device *pdev)
 		ret = at91_adc_buffer_init(idev);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "Couldn't initialize the buffer.\n");
-			goto error_free_irq;
+			return ret;
 		}
 
 		ret = at91_adc_trigger_init(idev);
 		if (ret < 0) {
 			dev_err(&pdev->dev, "Couldn't setup the triggers.\n");
 			at91_adc_buffer_remove(idev);
-			goto error_free_irq;
+			return ret;
 		}
 	} else {
 		ret = at91_ts_register(idev, pdev);
 		if (ret)
-			goto error_free_irq;
+			return ret;
 
 		at91_ts_hw_init(idev, adc_clk_khz);
 	}
@@ -1195,8 +1196,6 @@ static int at91_adc_probe(struct platform_device *pdev)
 	} else {
 		at91_ts_unregister(st);
 	}
-error_free_irq:
-	free_irq(st->irq, idev);
 	return ret;
 }
 
@@ -1212,7 +1211,6 @@ static int at91_adc_remove(struct platform_device *pdev)
 	} else {
 		at91_ts_unregister(st);
 	}
-	free_irq(st->irq, idev);
 
 	return 0;
 }
-- 
2.34.1