linux-kernel - [PATCH RESEND 2/3] drm/i915: check for return value

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Date:	Thu,  8 Oct 2015 19:28:00 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...ll.ch>
Cc:	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	intel-gfx@...ts.freedesktop.org,
	Daniel Vetter <daniel.vetter@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>
Subject: [PATCH RESEND 2/3] drm/i915: check for return value

We were not checking the return value of drm_encoder_init() which can
fail. And if it fails then we will be working with an uninitialized
encoder.

Cc: Daniel Vetter <daniel.vetter@...el.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---

Sent on 27/07/2015

 drivers/gpu/drm/i915/intel_dp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 18bcfbe..2a8b47e 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -6174,8 +6174,9 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 	intel_encoder = &intel_dig_port->base;
 	encoder = &intel_encoder->base;
 
-	drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
-			 DRM_MODE_ENCODER_TMDS);
+	if (drm_encoder_init(dev, &intel_encoder->base, &intel_dp_enc_funcs,
+			     DRM_MODE_ENCODER_TMDS))
+		goto err_encoder_init;
 
 	intel_encoder->compute_config = intel_dp_compute_config;
 	intel_encoder->disable = intel_disable_dp;
@@ -6224,6 +6225,7 @@ intel_dp_init(struct drm_device *dev, int output_reg, enum port port)
 
 err_init_connector:
 	drm_encoder_cleanup(encoder);
+err_encoder_init:
 	kfree(intel_connector);
 err_connector_alloc:
 	kfree(intel_dig_port);
-- 
1.9.1

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