[PATCH] drm: sti: Fix return value check in sti_drm_platform_probe()

[weiyj...@163.com]

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

In case of error, the function platform_device_register_resndata()
returns ERR_PTR() and never returns NULL. The NULL test in the return
value check should be replaced with IS_ERR().

Signed-off-by: Wei Yongjun <yongjun_wei at trendmicro.com.cn>
---
 drivers/gpu/drm/sti/sti_drm_drv.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_drm_drv.c 
b/drivers/gpu/drm/sti/sti_drm_drv.c
index a7cc249..c8a8412 100644
--- a/drivers/gpu/drm/sti/sti_drm_drv.c
+++ b/drivers/gpu/drm/sti/sti_drm_drv.c
@@ -201,8 +201,8 @@ static int sti_drm_platform_probe(struct platform_device 
*pdev)
        master = platform_device_register_resndata(dev,
                        DRIVER_NAME "__master", -1,
                        NULL, 0, NULL, 0);
-       if (!master)
-               return -EINVAL;
+       if (IS_ERR(master))
+               return PTR_ERR(master);

        platform_set_drvdata(pdev, master);
        return 0;