drm/sti: correctly test devm_ioremap() return

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@trendmicro.com.cn>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/sti/sti_dvo.c b/drivers/gpu/drm/sti/sti_dvo.c
index a9b678af85a6..d141d645bd13 100644
--- a/drivers/gpu/drm/sti/sti_dvo.c
+++ b/drivers/gpu/drm/sti/sti_dvo.c
@@ -499,8 +499,8 @@ 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)) {