drm/tegra: Fix return value check

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

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 84a73e3..844818f 100644 (file)
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -886,8 +886,8 @@ static int tegra_dsi_probe(struct platform_device *pdev)
 
        regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        dsi->regs = devm_ioremap_resource(&pdev->dev, regs);
-       if (!dsi->regs)
-               return -EADDRNOTAVAIL;
+       if (IS_ERR(dsi->regs))
+               return PTR_ERR(dsi->regs);
 
        tegra_dsi_initialize(dsi);