diff --git a/drivers/gpu/drm/exynos/exynos_drm_buf.c b/drivers/gpu/drm/exynos/exynos_drm_buf.c
index 7f489e7..3445a0f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_buf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_buf.c
@@ -149,10 +149,8 @@
 	DRM_DEBUG_KMS("desired size = 0x%x\n", size);
 
 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
-	if (!buffer) {
-		DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n");
+	if (!buffer)
 		return NULL;
-	}
 
 	buffer->size = size;
 	return buffer;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_connector.c b/drivers/gpu/drm/exynos/exynos_drm_connector.c
index 3f80673..de7c7b2 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_connector.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_connector.c
@@ -279,10 +279,8 @@
 	int err;
 
 	exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
-	if (!exynos_connector) {
-		DRM_ERROR("failed to allocate connector\n");
+	if (!exynos_connector)
 		return NULL;
-	}
 
 	connector = &exynos_connector->drm_connector;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index e6992d8..ebc0150 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -325,10 +325,8 @@
 	struct drm_crtc *crtc;
 
 	exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
-	if (!exynos_crtc) {
-		DRM_ERROR("failed to allocate exynos crtc\n");
+	if (!exynos_crtc)
 		return -ENOMEM;
-	}
 
 	exynos_crtc->pipe = nr;
 	exynos_crtc->dpms = DRM_MODE_DPMS_OFF;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index e80e0a8..59827cc 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -231,7 +231,6 @@
 
 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
 	if (!buffer) {
-		DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n");
 		ret = -ENOMEM;
 		goto err_unmap_attach;
 	}
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index df81d3c..bb82ef7 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -47,10 +47,8 @@
 	int nr;
 
 	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
-	if (!private) {
-		DRM_ERROR("failed to allocate private\n");
+	if (!private)
 		return -ENOMEM;
-	}
 
 	INIT_LIST_HEAD(&private->pageflip_event_list);
 	dev->dev_private = (void *)private;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index a99a033..06f1b2a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -324,10 +324,8 @@
 		return NULL;
 
 	exynos_encoder = kzalloc(sizeof(*exynos_encoder), GFP_KERNEL);
-	if (!exynos_encoder) {
-		DRM_ERROR("failed to allocate encoder\n");
+	if (!exynos_encoder)
 		return NULL;
-	}
 
 	exynos_encoder->dpms = DRM_MODE_DPMS_OFF;
 	exynos_encoder->manager = manager;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c
index c2d149f..ea39e0e 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fb.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c
@@ -156,10 +156,8 @@
 	}
 
 	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
-	if (!exynos_fb) {
-		DRM_ERROR("failed to allocate exynos drm framebuffer\n");
+	if (!exynos_fb)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	drm_helper_mode_fill_fb_struct(&exynos_fb->fb, mode_cmd);
 	exynos_fb->exynos_gem_obj[0] = exynos_gem_obj;
@@ -220,10 +218,8 @@
 	int i, ret;
 
 	exynos_fb = kzalloc(sizeof(*exynos_fb), GFP_KERNEL);
-	if (!exynos_fb) {
-		DRM_ERROR("failed to allocate exynos drm framebuffer\n");
+	if (!exynos_fb)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 	if (!obj) {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index eac6933..78e868b 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -248,10 +248,8 @@
 		return 0;
 
 	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
-	if (!fbdev) {
-		DRM_ERROR("failed to allocate drm fbdev.\n");
+	if (!fbdev)
 		return -ENOMEM;
-	}
 
 	private->fb_helper = helper = &fbdev->drm_fb_helper;
 	helper->funcs = &exynos_drm_fb_helper_funcs;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
index b047597..8adfc8f 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c
@@ -1345,10 +1345,8 @@
 	struct drm_exynos_ipp_prop_list *prop_list;
 
 	prop_list = devm_kzalloc(ippdrv->dev, sizeof(*prop_list), GFP_KERNEL);
-	if (!prop_list) {
-		DRM_ERROR("failed to alloc property list.\n");
+	if (!prop_list)
 		return -ENOMEM;
-	}
 
 	prop_list->version = 1;
 	prop_list->writeback = 1;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
index 19328d0..b8aa8fe 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c
@@ -890,10 +890,8 @@
 
 	if (dev->of_node) {
 		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-		if (!pdata) {
-			DRM_ERROR("memory allocation for pdata failed\n");
+		if (!pdata)
 			return -ENOMEM;
-		}
 
 		ret = of_get_fb_videomode(dev->of_node, &pdata->panel.timing,
 					OF_USE_NATIVE_MODE);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index 5cec194..0b8b6e4 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -447,10 +447,8 @@
 	}
 
 	g2d_userptr = kzalloc(sizeof(*g2d_userptr), GFP_KERNEL);
-	if (!g2d_userptr) {
-		DRM_ERROR("failed to allocate g2d_userptr.\n");
+	if (!g2d_userptr)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	atomic_set(&g2d_userptr->refcount, 1);
 
@@ -500,7 +498,6 @@
 
 	sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
 	if (!sgt) {
-		DRM_ERROR("failed to allocate sg table.\n");
 		ret = -ENOMEM;
 		goto err_free_userptr;
 	}
@@ -1087,8 +1084,6 @@
 
 		e = kzalloc(sizeof(*node->event), GFP_KERNEL);
 		if (!e) {
-			dev_err(dev, "failed to allocate event\n");
-
 			spin_lock_irqsave(&drm_dev->event_lock, flags);
 			file->event_space += sizeof(e->event);
 			spin_unlock_irqrestore(&drm_dev->event_lock, flags);
@@ -1318,10 +1313,8 @@
 	struct exynos_drm_g2d_private *g2d_priv;
 
 	g2d_priv = kzalloc(sizeof(*g2d_priv), GFP_KERNEL);
-	if (!g2d_priv) {
-		dev_err(dev, "failed to allocate g2d private data\n");
+	if (!g2d_priv)
 		return -ENOMEM;
-	}
 
 	g2d_priv->dev = dev;
 	file_priv->g2d_priv = g2d_priv;
@@ -1377,10 +1370,8 @@
 	int ret;
 
 	g2d = devm_kzalloc(dev, sizeof(*g2d), GFP_KERNEL);
-	if (!g2d) {
-		dev_err(dev, "failed to allocate driver data\n");
+	if (!g2d)
 		return -ENOMEM;
-	}
 
 	g2d->runqueue_slab = kmem_cache_create("g2d_runqueue_slab",
 			sizeof(struct g2d_runqueue_node), 0, 0, NULL);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index f3c6f40..862f1d9 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -191,10 +191,8 @@
 	int ret;
 
 	exynos_gem_obj = kzalloc(sizeof(*exynos_gem_obj), GFP_KERNEL);
-	if (!exynos_gem_obj) {
-		DRM_ERROR("failed to allocate exynos gem object\n");
+	if (!exynos_gem_obj)
 		return NULL;
-	}
 
 	exynos_gem_obj->size = size;
 	obj = &exynos_gem_obj->base;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
index e69d1d2..cd6aebd 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c
@@ -1338,10 +1338,8 @@
 	struct drm_exynos_ipp_prop_list *prop_list;
 
 	prop_list = devm_kzalloc(ippdrv->dev, sizeof(*prop_list), GFP_KERNEL);
-	if (!prop_list) {
-		DRM_ERROR("failed to alloc property list.\n");
+	if (!prop_list)
 		return -ENOMEM;
-	}
 
 	prop_list->version = 1;
 	prop_list->writeback = 1;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
index 8d3bc01..8548b97 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
@@ -403,10 +403,8 @@
 	struct drm_hdmi_context *ctx;
 
 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
-	if (!ctx) {
-		DRM_LOG_KMS("failed to alloc common hdmi context.\n");
+	if (!ctx)
 		return -ENOMEM;
-	}
 
 	subdrv = &ctx->subdrv;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index d2b6ab4..824e070 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -408,10 +408,8 @@
 	struct drm_exynos_ipp_cmd_work *cmd_work;
 
 	cmd_work = kzalloc(sizeof(*cmd_work), GFP_KERNEL);
-	if (!cmd_work) {
-		DRM_ERROR("failed to alloc cmd_work.\n");
+	if (!cmd_work)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	INIT_WORK((struct work_struct *)cmd_work, ipp_sched_cmd);
 
@@ -423,10 +421,8 @@
 	struct drm_exynos_ipp_event_work *event_work;
 
 	event_work = kzalloc(sizeof(*event_work), GFP_KERNEL);
-	if (!event_work) {
-		DRM_ERROR("failed to alloc event_work.\n");
+	if (!event_work)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	INIT_WORK((struct work_struct *)event_work, ipp_sched_event);
 
@@ -482,10 +478,8 @@
 
 	/* allocate command node */
 	c_node = kzalloc(sizeof(*c_node), GFP_KERNEL);
-	if (!c_node) {
-		DRM_ERROR("failed to allocate map node.\n");
+	if (!c_node)
 		return -ENOMEM;
-	}
 
 	/* create property id */
 	ret = ipp_create_id(&ctx->prop_idr, &ctx->prop_lock, c_node,
@@ -694,10 +688,8 @@
 	mutex_lock(&c_node->mem_lock);
 
 	m_node = kzalloc(sizeof(*m_node), GFP_KERNEL);
-	if (!m_node) {
-		DRM_ERROR("failed to allocate queue node.\n");
+	if (!m_node)
 		goto err_unlock;
-	}
 
 	/* clear base address for error handling */
 	memset(&buf_info, 0x0, sizeof(buf_info));
@@ -798,9 +790,7 @@
 	DRM_DEBUG_KMS("ops_id[%d]buf_id[%d]\n", qbuf->ops_id, qbuf->buf_id);
 
 	e = kzalloc(sizeof(*e), GFP_KERNEL);
-
 	if (!e) {
-		DRM_ERROR("failed to allocate event.\n");
 		spin_lock_irqsave(&drm_dev->event_lock, flags);
 		file->event_space += sizeof(e->event);
 		spin_unlock_irqrestore(&drm_dev->event_lock, flags);
@@ -1780,10 +1770,8 @@
 	struct exynos_drm_ipp_private *priv;
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		DRM_ERROR("failed to allocate priv.\n");
+	if (!priv)
 		return -ENOMEM;
-	}
 	priv->dev = dev;
 	file_priv->ipp_priv = priv;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c
index 98eb1f7..fcb0652 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_plane.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c
@@ -265,10 +265,8 @@
 	int err;
 
 	exynos_plane = kzalloc(sizeof(struct exynos_plane), GFP_KERNEL);
-	if (!exynos_plane) {
-		DRM_ERROR("failed to allocate plane\n");
+	if (!exynos_plane)
 		return NULL;
-	}
 
 	err = drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
 			      &exynos_plane_funcs, formats, ARRAY_SIZE(formats),
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
index a77cd5b..7b90168 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
@@ -472,10 +472,8 @@
 	struct drm_exynos_ipp_prop_list *prop_list;
 
 	prop_list = devm_kzalloc(ippdrv->dev, sizeof(*prop_list), GFP_KERNEL);
-	if (!prop_list) {
-		DRM_ERROR("failed to alloc property list.\n");
+	if (!prop_list)
 		return -ENOMEM;
-	}
 
 	prop_list->version = 1;
 	prop_list->flip = (1 << EXYNOS_DRM_FLIP_VERTICAL) |
@@ -713,10 +711,8 @@
 	}
 
 	rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL);
-	if (!rot) {
-		dev_err(dev, "failed to allocate rot\n");
+	if (!rot)
 		return -ENOMEM;
-	}
 
 	match = of_match_node(exynos_rotator_match, dev->of_node);
 	if (!match) {
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index aecc601..8ea07a10 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1825,10 +1825,8 @@
 
 	res->regul_bulk = devm_kzalloc(dev, ARRAY_SIZE(supply) *
 		sizeof(res->regul_bulk[0]), GFP_KERNEL);
-	if (!res->regul_bulk) {
-		DRM_ERROR("failed to get memory for regulators\n");
+	if (!res->regul_bulk)
 		goto fail;
-	}
 	for (i = 0; i < ARRAY_SIZE(supply); ++i) {
 		res->regul_bulk[i].supply = supply[i];
 		res->regul_bulk[i].consumer = NULL;
@@ -1869,10 +1867,8 @@
 	u32 value;
 
 	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
-	if (!pd) {
-		DRM_ERROR("memory allocation for pdata failed\n");
+	if (!pd)
 		goto err_data;
-	}
 
 	if (!of_find_property(np, "hpd-gpio", &value)) {
 		DRM_ERROR("no hpd gpio property found\n");
@@ -1952,17 +1948,13 @@
 
 	drm_hdmi_ctx = devm_kzalloc(dev, sizeof(*drm_hdmi_ctx),
 								GFP_KERNEL);
-	if (!drm_hdmi_ctx) {
-		DRM_ERROR("failed to allocate common hdmi context.\n");
+	if (!drm_hdmi_ctx)
 		return -ENOMEM;
-	}
 
 	hdata = devm_kzalloc(dev, sizeof(struct hdmi_context),
 								GFP_KERNEL);
-	if (!hdata) {
-		DRM_ERROR("out of memory\n");
+	if (!hdata)
 		return -ENOMEM;
-	}
 
 	mutex_init(&hdata->hdmi_mutex);
 
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index f6cb120..63bc5f9 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -1186,16 +1186,12 @@
 
 	drm_hdmi_ctx = devm_kzalloc(dev, sizeof(*drm_hdmi_ctx),
 								GFP_KERNEL);
-	if (!drm_hdmi_ctx) {
-		DRM_ERROR("failed to allocate common hdmi context.\n");
+	if (!drm_hdmi_ctx)
 		return -ENOMEM;
-	}
 
 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
-	if (!ctx) {
-		DRM_ERROR("failed to alloc mixer context.\n");
+	if (!ctx)
 		return -ENOMEM;
-	}
 
 	mutex_init(&ctx->mixer_mutex);