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
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -886,8 +886,8 @@
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);