[PATCH] drm/exynos: fix error return code in exynos_drm_ipp_set_property()

[Wei Yongjun]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
ipp_create_cmd_work() return ERR_PTR() on error and never return
NULL, so use IS_ERR() instead of IS_ERR_OR_NULL().

Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
---
 drivers/gpu/drm/exynos/exynos_drm_ipp.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c 
b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index 29d2ad3..b0d6431 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -521,20 +521,23 @@ int exynos_drm_ipp_set_property(struct drm_device 
*drm_dev, void *data,
        c_node->state = IPP_STATE_IDLE;

        c_node->start_work = ipp_create_cmd_work();
-       if (IS_ERR_OR_NULL(c_node->start_work)) {
+       if (IS_ERR(c_node->start_work)) {
                DRM_ERROR("failed to create start work.\n");
+               ret = PTR_ERR(c_node->start_work);
                goto err_clear;
        }

        c_node->stop_work = ipp_create_cmd_work();
-       if (IS_ERR_OR_NULL(c_node->stop_work)) {
+       if (IS_ERR(c_node->stop_work)) {
                DRM_ERROR("failed to create stop work.\n");
+               ret = PTR_ERR(c_node->stop_work);
                goto err_free_start;
        }

        c_node->event_work = ipp_create_event_work();
-       if (IS_ERR_OR_NULL(c_node->event_work)) {
+       if (IS_ERR(c_node->event_work)) {
                DRM_ERROR("failed to create event work.\n");
+               ret = PTR_ERR(c_node->event_work);
                goto err_free_stop;
        }