linux-kernel - [PATCH 1/2] drm/i915: use error path

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Date:	Mon, 27 Jul 2015 17:36:15 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	David Airlie <airlied@...ux.ie>
Cc:	linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 1/2] drm/i915: use error path

Use goto to handle the error path to avoid duplicating the same code. In
the error path intel_dig_port is the last one to be released as it was
the first one to be allocated and ideally the error path should be the
reverse of the execution path.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 drivers/gpu/drm/i915/intel_dp.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index f1b9f93..c084bca 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5864,10 +5864,8 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 		return;
 
 	intel_connector = intel_connector_alloc();
-	if (!intel_connector) {
-		kfree(intel_dig_port);
-		return;
-	}
+	if (!intel_connector)
+		goto err_connector_alloc;
 
 	intel_encoder = &intel_dig_port->base;
 	encoder = &intel_encoder->base;
@@ -5914,11 +5912,18 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 	intel_dig_port->hpd_pulse = intel_dp_hpd_pulse;
 	dev_priv->hotplug.irq_port[port] = intel_dig_port;
 
-	if (!intel_dp_init_connector(intel_dig_port, intel_connector)) {
-		drm_encoder_cleanup(encoder);
-		kfree(intel_dig_port);
-		kfree(intel_connector);
-	}
+	if (!intel_dp_init_connector(intel_dig_port, intel_connector))
+		goto err_init_connector;
+
+	return;
+
+err_init_connector:
+	drm_encoder_cleanup(encoder);
+	kfree(intel_connector);
+err_connector_alloc:
+	kfree(intel_dig_port);
+
+	return;
 }
 
 void intel_dp_mst_suspend(struct drm_device *dev)
-- 
1.9.1

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