linux-kernel - [PATCH] drm/tegra: dpaux: Modify error handling

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Message-ID: <20160813040020.GA11719@amitoj-Inspiron-3542>
Date:	Sat, 13 Aug 2016 09:30:20 +0530
From:	Amitoj Kaur Chawla <amitoj1606@...il.com>
To:	thierry.reding@...il.com, airlied@...ux.ie, swarren@...dotorg.org,
	gnurou@...il.com, dri-devel@...ts.freedesktop.org,
	linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	julia.lawall@...6.fr
Subject: [PATCH] drm/tegra: dpaux: Modify error handling

devm_pinctrl_register returns an ERR_PTR in case of error and should
have an IS_ERR check instead of a null check.

The Coccinelle semantic patch used to make this change is as follows:
@@
expression e;
@@

  e = devm_pinxtrl_register(...);
if(
-    !e
+    IS_ERR(e)
    )
    {
  <+...
  return
- ...
+ PTR_ERR(e)
  ;
  ...+>
  }

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@...il.com>
---
 drivers/gpu/drm/tegra/dpaux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index 059f409..2fde44c 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -539,9 +539,9 @@ static int tegra_dpaux_probe(struct platform_device *pdev)
 	dpaux->desc.owner = THIS_MODULE;
 
 	dpaux->pinctrl = devm_pinctrl_register(&pdev->dev, &dpaux->desc, dpaux);
-	if (!dpaux->pinctrl) {
+	if (IS_ERR(dpaux->pinctrl)) {
 		dev_err(&pdev->dev, "failed to register pincontrol\n");
-		return -ENODEV;
+		return PTR_ERR(dpaux->pinctrl);
 	}
 #endif
 	/* enable and clear all interrupts */
-- 
1.9.1