[PATCH] drm: sti: tvout: fix return value check in sti_tvout_probe()

[weiyj_lk at 163.com]

From: Wei Yongjun <yongjun_wei at trendmicro.com.cn>

In case of error, the function devm_ioremap_nocache() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

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

diff --git a/drivers/gpu/drm/sti/sti_tvout.c b/drivers/gpu/drm/sti/sti_tvout.c
index b69e26f..9ad2d44 100644
--- a/drivers/gpu/drm/sti/sti_tvout.c
+++ b/drivers/gpu/drm/sti/sti_tvout.c
@@ -591,8 +591,8 @@ static int sti_tvout_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 	tvout->regs = devm_ioremap_nocache(dev, res->start, resource_size(res));
-	if (IS_ERR(tvout->regs))
-		return PTR_ERR(tvout->regs);
+	if (!tvout->regs)
+		return -ENOMEM;
 
 	/* get reset resources */
 	tvout->reset = devm_reset_control_get(dev, "tvout");