[PATCH 3/8] drm/i915/sdvo: Check error return from intel_sdvo_get_value()

[Imre Deak]

The current code assumes that 'enhancements' won't change in case of an
error, but this isn't guaranteed. Fix things by treating any error as a
lack of the given capability.

Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/intel_sdvo.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
index 816a6f5..0d1c511 100644
--- a/drivers/gpu/drm/i915/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/intel_sdvo.c
@@ -2893,10 +2893,10 @@ static bool intel_sdvo_create_enhance_property(struct intel_sdvo *intel_sdvo,
 	BUILD_BUG_ON(sizeof(enhancements) != 2);
 
 	enhancements.response = 0;
-	intel_sdvo_get_value(intel_sdvo,
-			     SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS,
-			     &enhancements, sizeof(enhancements));
-	if (enhancements.response == 0) {
+	if (!intel_sdvo_get_value(intel_sdvo,
+				  SDVO_CMD_GET_SUPPORTED_ENHANCEMENTS,
+				  &enhancements, sizeof(enhancements)) ||
+	    enhancements.response == 0) {
 		DRM_DEBUG_KMS("No enhancement is supported\n");
 		return true;
 	}
-- 
2.5.0