[PATCH] drm/sti: fix return value check in sti_dvo_probe()

[weiyj...@163.com]

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

In case of error, the function devm_ioremap_nocache() returns NULL
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_dvo.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index aeb5070..ae4c3df 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -495,8 +495,8 @@ static int sti_dvo_probe(struct platform_device *pdev)
        }
        dvo->regs = devm_ioremap_nocache(dev, res->start,
                        resource_size(res));
-       if (IS_ERR(dvo->regs))
-               return PTR_ERR(dvo->regs);
+       if (!dvo->regs)
+               return -ENOMEM;

        dvo->clk_pix = devm_clk_get(dev, "dvo_pix");
        if (IS_ERR(dvo->clk_pix)) {