drm/msm/dpu: Remove unnecessary NULL checks

drm_device.dev_private is set to a non-NULL msm_drm_private
struct in msm_drm_init. Successful initialization of msm means
that dev_private is non-NULL so there is no need to check it
everywhere.
Signed-off-by: Drew Davenport <ddavenport@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_core_irq.c

@@ -349,9 +349,6 @@ void dpu_core_irq_preinstall(struct dpu_kms *dpu_kms)
 	if (!dpu_kms->dev) {
 		DPU_ERROR("invalid drm device\n");
 		return;
-	} else if (!dpu_kms->dev->dev_private) {
-		DPU_ERROR("invalid device private\n");
-		return;
 	}
 	priv = dpu_kms->dev->dev_private;
 
@@ -385,9 +382,6 @@ void dpu_core_irq_uninstall(struct dpu_kms *dpu_kms)
 	if (!dpu_kms->dev) {
 		DPU_ERROR("invalid drm device\n");
 		return;
-	} else if (!dpu_kms->dev->dev_private) {
-		DPU_ERROR("invalid device private\n");
-		return;
 	}
 	priv = dpu_kms->dev->dev_private;
 

drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c

@@ -33,13 +33,13 @@ static struct dpu_kms *_dpu_crtc_get_kms(struct drm_crtc *crtc)
 {
 	struct msm_drm_private *priv;
 
-	if (!crtc->dev || !crtc->dev->dev_private) {
+	if (!crtc->dev) {
 		DPU_ERROR("invalid device\n");
 		return NULL;
 	}
 
 	priv = crtc->dev->dev_private;
-	if (!priv || !priv->kms) {
+	if (!priv->kms) {
 		DPU_ERROR("invalid kms\n");
 		return NULL;
 	}

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

@@ -694,7 +694,7 @@ static void dpu_crtc_disable(struct drm_crtc *crtc,
 	unsigned long flags;
 	bool release_bandwidth = false;
 
-	if (!crtc || !crtc->dev || !crtc->dev->dev_private || !crtc->state) {
+	if (!crtc || !crtc->dev || !crtc->state) {
 		DPU_ERROR("invalid crtc\n");
 		return;
 	}
@@ -766,7 +766,7 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 	struct msm_drm_private *priv;
 	bool request_bandwidth;
 
-	if (!crtc || !crtc->dev || !crtc->dev->dev_private) {
+	if (!crtc || !crtc->dev) {
 		DPU_ERROR("invalid crtc\n");
 		return;
 	}

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

@@ -735,8 +735,7 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
 	struct msm_drm_private *priv;
 	bool is_vid_mode = false;
 
-	if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private ||
-			!drm_enc->crtc) {
+	if (!drm_enc || !drm_enc->dev || !drm_enc->crtc) {
 		DPU_ERROR("invalid parameters\n");
 		return -EINVAL;
 	}
@@ -1092,7 +1091,7 @@ static void _dpu_encoder_virt_enable_helper(struct drm_encoder *drm_enc)
 	struct msm_drm_private *priv;
 	struct dpu_kms *dpu_kms;
 
-	if (!drm_enc || !drm_enc->dev || !drm_enc->dev->dev_private) {
+	if (!drm_enc || !drm_enc->dev) {
 		DPU_ERROR("invalid parameters\n");
 		return;
 	}
@@ -1193,9 +1192,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 	} else if (!drm_enc->dev) {
 		DPU_ERROR("invalid dev\n");
 		return;
-	} else if (!drm_enc->dev->dev_private) {
-		DPU_ERROR("invalid dev_private\n");
-		return;
 	}
 
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
@@ -1734,8 +1730,7 @@ static void dpu_encoder_vsync_event_handler(struct timer_list *t)
 	struct msm_drm_private *priv;
 	struct msm_drm_thread *event_thread;
 
-	if (!drm_enc->dev || !drm_enc->dev->dev_private ||
-			!drm_enc->crtc) {
+	if (!drm_enc->dev || !drm_enc->crtc) {
 		DPU_ERROR("invalid parameters\n");
 		return;
 	}
@@ -1925,7 +1920,7 @@ static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
 
 	char name[DPU_NAME_SIZE];
 
-	if (!drm_enc->dev || !drm_enc->dev->dev_private) {
+	if (!drm_enc->dev) {
 		DPU_ERROR("invalid encoder or kms\n");
 		return -EINVAL;
 	}
@@ -2130,7 +2125,7 @@ static void dpu_encoder_frame_done_timeout(struct timer_list *t)
 	struct drm_encoder *drm_enc = &dpu_enc->base;
 	u32 event;
 
-	if (!drm_enc->dev || !drm_enc->dev->dev_private) {
+	if (!drm_enc->dev) {
 		DPU_ERROR("invalid parameters\n");
 		return;
 	}

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c

@@ -373,7 +373,7 @@ static void dpu_encoder_phys_cmd_tearcheck_config(
 	}
 
 	dpu_kms = phys_enc->dpu_kms;
-	if (!dpu_kms || !dpu_kms->dev || !dpu_kms->dev->dev_private) {
+	if (!dpu_kms || !dpu_kms->dev) {
 		DPU_ERROR("invalid device\n");
 		return;
 	}

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c

@@ -570,8 +570,7 @@ static void dpu_encoder_phys_vid_disable(struct dpu_encoder_phys *phys_enc)
 	unsigned long lock_flags;
 	int ret;
 
-	if (!phys_enc || !phys_enc->parent || !phys_enc->parent->dev ||
-			!phys_enc->parent->dev->dev_private) {
+	if (!phys_enc || !phys_enc->parent || !phys_enc->parent->dev) {
 		DPU_ERROR("invalid encoder/device\n");
 		return;
 	}

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

@@ -72,7 +72,7 @@ static int _dpu_danger_signal_status(struct seq_file *s,
 	struct dpu_danger_safe_status status;
 	int i;
 
-	if (!kms->dev || !kms->dev->dev_private || !kms->hw_mdp) {
+	if (!kms->dev || !kms->hw_mdp) {
 		DPU_ERROR("invalid arg(s)\n");
 		return 0;
 	}
@@ -157,9 +157,6 @@ static int _dpu_debugfs_show_regset32(struct seq_file *s, void *data)
 		return 0;
 
 	priv = dev->dev_private;
-	if (!priv)
-		return 0;
-
 	base = dpu_kms->mmio + regset->offset;
 
 	/* insert padding spaces, if needed */
@@ -292,7 +289,7 @@ static void dpu_kms_prepare_commit(struct msm_kms *kms,
 	dpu_kms = to_dpu_kms(kms);
 	dev = dpu_kms->dev;
 
-	if (!dev || !dev->dev_private)
+	if (!dev)
 		return;
 	priv = dev->dev_private;
 
@@ -470,9 +467,6 @@ static void _dpu_kms_drm_obj_destroy(struct dpu_kms *dpu_kms)
 	} else if (!dpu_kms->dev) {
 		DPU_ERROR("invalid dev\n");
 		return;
-	} else if (!dpu_kms->dev->dev_private) {
-		DPU_ERROR("invalid dev_private\n");
-		return;
 	}
 	priv = dpu_kms->dev->dev_private;
 
@@ -809,10 +803,6 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
 	}
 
 	priv = dev->dev_private;
-	if (!priv) {
-		DPU_ERROR("invalid private data\n");
-		return rc;
-	}
 
 	atomic_set(&dpu_kms->bandwidth_ref, 0);
 
@@ -974,7 +964,7 @@ struct msm_kms *dpu_kms_init(struct drm_device *dev)
 	struct dpu_kms *dpu_kms;
 	int irq;
 
-	if (!dev || !dev->dev_private) {
+	if (!dev) {
 		DPU_ERROR("drm device node invalid\n");
 		return ERR_PTR(-EINVAL);
 	}