[PATCH 3/4] drm/i915/dp: return proper error codes instead of magic -1

[Jani Nikula <jani.nikula@intel.com>]

Use proper negative error codes intead of magic -1. Don't set a bad
example, as -1 is -EPERM.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index e05e25cd4a94..30c1f39ff6d6 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -600,7 +600,7 @@ static int intersect_rates(const int *source_rates, int source_len,
 	return k;
 }
 
-/* return index of rate in rates array, or -1 if not found */
+/* return index of rate in rates array, or -ENOENT if not found */
 static int intel_dp_rate_index(const int *rates, int len, int rate)
 {
 	int i;
@@ -609,7 +609,7 @@ static int intel_dp_rate_index(const int *rates, int len, int rate)
 		if (rate == rates[i])
 			return i;
 
-	return -1;
+	return -ENOENT;
 }
 
 static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
@@ -680,7 +680,7 @@ int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
 	 */
 	if (intel_dp->is_mst) {
 		drm_err(&i915->drm, "Link Training Unsuccessful\n");
-		return -1;
+		return -EINVAL;
 	}
 
 	if (intel_dp_is_edp(intel_dp) && !intel_dp->use_max_params) {
@@ -717,7 +717,7 @@ int intel_dp_get_link_train_fallback_values(struct intel_dp *intel_dp,
 		intel_dp->max_link_lane_count = lane_count >> 1;
 	} else {
 		drm_err(&i915->drm, "Link Training Unsuccessful\n");
-		return -1;
+		return -EINVAL;
 	}
 
 	return 0;
-- 
2.39.2