linux-kernel - [PATCH 1/2] drivers/gpu/drm/tilcdc/tilcdc

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Date:	Sun, 24 Feb 2013 12:55:33 +0100
From:	Julia Lawall <Julia.Lawall@...6.fr>
To:	David Airlie <airlied@...ux.ie>
Cc:	kernel-janitors@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] drivers/gpu/drm/tilcdc/tilcdc_drv.c: adjust duplicate test

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

Delete successive tests to the same location.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@s exists@
local idexpression y;
expression x,e;
@@

*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\)
*if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
 { ... when forall
   return ...; }
// </smpl>

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

---
 drivers/gpu/drm/tilcdc/tilcdc_drv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index c5b592d..3ad0a63 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -192,7 +192,7 @@ static int tilcdc_load(struct drm_device *dev, unsigned long flags)
 	}
 
 	priv->disp_clk = clk_get(dev->dev, "dpll_disp_ck");
-	if (IS_ERR(priv->clk)) {
+	if (IS_ERR(priv->disp_clk)) {
 		dev_err(dev->dev, "failed to get display clock\n");
 		ret = -ENODEV;
 		goto fail;

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