[PATCH] drm: loongson: Add a check for lsdc_bo_create() errors

[Dan Carpenter]

The lsdc_bo_create() function can fail so add a check for that.

Fixes: f39db26c5428 ("drm: Add kms driver for loongson display controller")
Signed-off-by: Dan Carpenter <dan.carpen...@linaro.org>
---
 drivers/gpu/drm/loongson/lsdc_ttm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/loongson/lsdc_ttm.c 
b/drivers/gpu/drm/loongson/lsdc_ttm.c
index bb0c8fd43a75..bf79dc55afa4 100644
--- a/drivers/gpu/drm/loongson/lsdc_ttm.c
+++ b/drivers/gpu/drm/loongson/lsdc_ttm.c
@@ -496,6 +496,8 @@ struct lsdc_bo *lsdc_bo_create_kernel_pinned(struct 
drm_device *ddev,
        int ret;
 
        lbo = lsdc_bo_create(ddev, domain, size, true, NULL, NULL);
+       if (IS_ERR(lbo))
+               return ERR_CAST(lbo);
 
        ret = lsdc_bo_reserve(lbo);
        if (unlikely(ret)) {
-- 
2.39.2