diff --git a/drivers/gpu/drm/msm/edp/edp_aux.c b/drivers/gpu/drm/msm/edp/edp_aux.c
index 208f9d47f82e..5f77bf0adf1d 100644
--- a/drivers/gpu/drm/msm/edp/edp_aux.c
+++ b/drivers/gpu/drm/msm/edp/edp_aux.c
@@ -119,6 +119,7 @@ ssize_t edp_aux_transfer(struct drm_dp_aux *drm_aux, struct drm_dp_aux_msg *msg)
 {
 	struct edp_aux *aux = to_edp_aux(drm_aux);
 	ssize_t ret;
+	unsigned long time_left;
 	bool native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ);
 	bool read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ);
 
@@ -147,15 +148,16 @@ ssize_t edp_aux_transfer(struct drm_dp_aux *drm_aux, struct drm_dp_aux_msg *msg)
 		goto unlock_exit;
 
 	DBG("wait_for_completion");
-	ret = wait_for_completion_timeout(&aux->msg_comp, 300);
-	if (ret <= 0) {
+	time_left = wait_for_completion_timeout(&aux->msg_comp, 300);
+	if (!time_left) {
 		/*
 		 * Clear GO and reset AUX channel
 		 * to cancel the current transaction.
 		 */
 		edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, 0);
 		msm_edp_aux_ctrl(aux, 1);
-		pr_err("%s: aux timeout, %zd\n", __func__, ret);
+		pr_err("%s: aux timeout, %lu\n", __func__, time_left);
+		ret = -ETIMEDOUT;
 		goto unlock_exit;
 	}
 	DBG("completion");