linux-kernel - [PATCH 2/2] drm/msm/dsi: One function call less in dsi

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Date:	Sat, 27 Jun 2015 23:23:10 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	David Airlie <airlied@...ux.ie>, Hai Li <hali@...eaurora.org>,
	dri-devel@...ts.freedesktop.org
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, Rob Clark <robdclark@...il.com>,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 2/2] drm/msm/dsi: One function call less in dsi_init() after
 error detection

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 27 Jun 2015 22:23:28 +0200

The dsi_destroy() function was called in two cases by the dsi_init() function
during error handling even if the passed variable contained a null pointer.

* This implementation detail could be improved by adjustments for jump
  targets according to the Linux coding style convention.

* Drop an unnecessary initialisation for the variable "msm_dsi" then.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/gpu/drm/msm/dsi/dsi.c | 22 +++++++++-------------
 1 file changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
index dc4f38f..971f000 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -74,19 +74,15 @@ static void dsi_destroy(struct msm_dsi *msm_dsi)
 
 static struct msm_dsi *dsi_init(struct platform_device *pdev)
 {
-	struct msm_dsi *msm_dsi = NULL;
+	struct msm_dsi *msm_dsi;
 	int ret;
 
-	if (!pdev) {
-		ret = -ENXIO;
-		goto fail;
-	}
+	if (!pdev)
+		return -ENXIO;
 
 	msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
-	if (!msm_dsi) {
-		ret = -ENOMEM;
-		goto fail;
-	}
+	if (!msm_dsi)
+		return -ENOMEM;
 	DBG("dsi probed=%p", msm_dsi);
 
 	msm_dsi->pdev = pdev;
@@ -95,21 +91,21 @@ static struct msm_dsi *dsi_init(struct platform_device *pdev)
 	/* Init dsi host */
 	ret = msm_dsi_host_init(msm_dsi);
 	if (ret)
-		goto fail;
+		goto destroy_dsi;
 
 	/* GET dsi PHY */
 	ret = dsi_get_phy(msm_dsi);
 	if (ret)
-		goto fail;
+		goto destroy_dsi;
 
 	/* Register to dsi manager */
 	ret = msm_dsi_manager_register(msm_dsi);
 	if (ret)
-		goto fail;
+		goto destroy_dsi;
 
 	return msm_dsi;
 
-fail:
+destroy_dsi:
 	dsi_destroy(msm_dsi);
 	return ERR_PTR(ret);
 }
-- 
2.4.4

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