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

Sudip Mukherjee
2015-10-08T13:58:15Z

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@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.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