linux-kernel - [PATCH 6/6] drivers/iio/adc/at91_adc.c: adjust inconsistent IS_ERR and PTR

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Date:	Sat, 25 Aug 2012 21:57:09 +0200
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	Jonathan Cameron <jic23@....ac.uk>
Cc:	kernel-janitors@...r.kernel.org, linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] drivers/iio/adc/at91_adc.c: adjust inconsistent IS_ERR and PTR_ERR

From: Julia Lawall <Julia.Lawall@...6.fr>

Change the call to PTR_ERR to access the value just tested by IS_ERR.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e,e1;
@@

(
if (IS_ERR(e)) { ... PTR_ERR(e) ... }
|
if (IS_ERR(e=e1)) { ... PTR_ERR(e) ... }
|
*if (IS_ERR(e))
 { ...
*  PTR_ERR(e1)
   ... }
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/iio/adc/at91_adc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 98c96f9..8650281 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -604,7 +604,7 @@ static int __devinit at91_adc_probe(struct platform_device *pdev)
 	st->adc_clk = devm_clk_get(&pdev->dev, "adc_op_clk");
 	if (IS_ERR(st->adc_clk)) {
 		dev_err(&pdev->dev, "Failed to get the ADC clock.\n");
-		ret = PTR_ERR(st->clk);
+		ret = PTR_ERR(st->adc_clk);
 		goto error_disable_clk;
 	}
 

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