1 files changed, 6 insertions, 7 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index b1ef8e7ff9c9..d2b6ab4def93 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -12,7 +12,6 @@
  *
  */
 #include <linux/kernel.h>
-#include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/types.h>
 #include <linux/clk.h>
@@ -342,10 +341,10 @@ int exynos_drm_ipp_get_property(struct drm_device *drm_dev, void *data,
                  */
                 ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock,
                                                 prop_list->ipp_id);
-                if (!ippdrv) {
+                if (IS_ERR(ippdrv)) {
                         DRM_ERROR("not found ipp%d driver.\n",
                                         prop_list->ipp_id);
-                        return -EINVAL;
+                        return PTR_ERR(ippdrv);
                 }
 
                 prop_list = ippdrv->prop_list;
@@ -970,9 +969,9 @@ int exynos_drm_ipp_queue_buf(struct drm_device *drm_dev, void *data,
         /* find command node */
         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
                 qbuf->prop_id);
-        if (!c_node) {
+        if (IS_ERR(c_node)) {
                 DRM_ERROR("failed to get command node.\n");
-                return -EFAULT;
+                return PTR_ERR(c_node);
         }
 
         /* buffer control */
@@ -1106,9 +1105,9 @@ int exynos_drm_ipp_cmd_ctrl(struct drm_device *drm_dev, void *data,
 
         c_node = ipp_find_obj(&ctx->prop_idr, &ctx->prop_lock,
                 cmd_ctrl->prop_id);
-        if (!c_node) {
+        if (IS_ERR(c_node)) {
                 DRM_ERROR("invalid command node list.\n");
-                return -EINVAL;
+                return PTR_ERR(c_node);
         }
 
         if (!exynos_drm_ipp_check_valid(ippdrv->dev, cmd_ctrl->ctrl,