From: Fabio Estevam <fabio.estevam@nxp.com>
Date: Wed, 27 Jun 2018 10:07:45 -0300
Subject: drm/etnaviv: Check for platform_device_register_simple() failure
Git-commit: 45a0faaba9c8c5ba1e31a08a391aed0bad327167
Patch-mainline: v4.18-rc5
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
platform_device_register_simple() may fail, so we should better
check its return value and propagate it in the case of error.
Cc: <stable@vger.kernel.org>
Fixes: 246774d17fc0 ("drm/etnaviv: remove the need for a gpu-subsystem DT node")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/etnaviv/etnaviv_drv.c | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -631,8 +631,11 @@ static struct platform_driver etnaviv_pl
},
};
+static struct platform_device *etnaviv_drm;
+
static int __init etnaviv_init(void)
{
+ struct platform_device *pdev;
int ret;
struct device_node *np;
@@ -644,7 +647,7 @@ static int __init etnaviv_init(void)
ret = platform_driver_register(&etnaviv_platform_driver);
if (ret != 0)
- platform_driver_unregister(&etnaviv_gpu_driver);
+ goto unregister_gpu_driver;
/*
* If the DT contains at least one available GPU device, instantiate
@@ -653,12 +656,24 @@ static int __init etnaviv_init(void)
for_each_compatible_node(np, NULL, "vivante,gc") {
if (!of_device_is_available(np))
continue;
-
- platform_device_register_simple("etnaviv", -1, NULL, 0);
+ pdev = platform_device_register_simple("etnaviv", -1,
+ NULL, 0);
+ if (IS_ERR(pdev)) {
+ ret = PTR_ERR(pdev);
+ of_node_put(np);
+ goto unregister_platform_driver;
+ }
+ etnaviv_drm = pdev;
of_node_put(np);
break;
}
+ return 0;
+
+unregister_platform_driver:
+ platform_driver_unregister(&etnaviv_platform_driver);
+unregister_gpu_driver:
+ platform_driver_unregister(&etnaviv_gpu_driver);
return ret;
}
module_init(etnaviv_init);