Am Dienstag, dem 20.06.2023 um 17:47 +0800 schrieb Sui Jingfeng:
> From: Sui Jingfeng <suijingf...@loongson.cn>
>
> Also rename the virtual master platform device as etnaviv_platform_device,
> for better reflection that it is a platform device, not a DRM device.
>
> Another benefit is that we no longer need to call of_node_put() for three
> different cases, Instead, we only need to call it once.
>
> Cc: Lucas Stach <l.st...@pengutronix.de>
> Cc: Christian Gmeiner <christian.gmei...@gmail.com>
> Cc: Philipp Zabel <p.za...@pengutronix.de>
> Cc: Bjorn Helgaas <bhelg...@google.com>
> Cc: Daniel Vetter <dan...@ffwll.ch>
> Signed-off-by: Sui Jingfeng <suijingf...@loongson.cn>
> ---
> drivers/gpu/drm/etnaviv/etnaviv_drv.c | 56 +++++++++++++++++++--------
> 1 file changed, 39 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> index 31a7f59ccb49..cec005035d0e 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
> @@ -656,12 +656,44 @@ static struct platform_driver etnaviv_platform_driver =
> {
> },
> };
>
> -static struct platform_device *etnaviv_drm;
> +static struct platform_device *etnaviv_platform_device;
>
> -static int __init etnaviv_init(void)
> +static int etnaviv_create_platform_device(const char *name,
> + struct platform_device **ppdev)
As the platform device is a global static variable, there is no need to
push it through the parameters of this function. Just use the global
variable directly in this function.
> {
> struct platform_device *pdev;
> int ret;
> +
> + pdev = platform_device_alloc(name, PLATFORM_DEVID_NONE);
> + if (!pdev)
> + return -ENOMEM;
> +
> + ret = platform_device_add(pdev);
> + if (ret) {
> + platform_device_put(pdev);
> + return ret;
> + }
> +
> + *ppdev = pdev;
> +
> + return 0;
> +}
> +
> +static void etnaviv_destroy_platform_device(struct platform_device **ppdev)
> +{
> + struct platform_device *pdev = *ppdev;
Same here, just use the global variable directly.
Regards,
Lucas
> +
> + if (!pdev)
> + return;
> +
> + platform_device_unregister(pdev);
> +
> + *ppdev = NULL;
> +}
> +
> +static int __init etnaviv_init(void)
> +{
> + int ret;
> struct device_node *np;
>
> etnaviv_validate_init();
> @@ -681,23 +713,13 @@ static int __init etnaviv_init(void)
> for_each_compatible_node(np, NULL, "vivante,gc") {
> if (!of_device_is_available(np))
> continue;
> + of_node_put(np);
>
> - pdev = platform_device_alloc("etnaviv", PLATFORM_DEVID_NONE);
> - if (!pdev) {
> - ret = -ENOMEM;
> - of_node_put(np);
> - goto unregister_platform_driver;
> - }
> -
> - ret = platform_device_add(pdev);
> - if (ret) {
> - platform_device_put(pdev);
> - of_node_put(np);
> + ret = etnaviv_create_platform_device("etnaviv",
> + &etnaviv_platform_device);
> + if (ret)
> goto unregister_platform_driver;
> - }
>
> - etnaviv_drm = pdev;
> - of_node_put(np);
> break;
> }
>
> @@ -713,7 +735,7 @@ module_init(etnaviv_init);
>
> static void __exit etnaviv_exit(void)
> {
> - platform_device_unregister(etnaviv_drm);
> + etnaviv_destroy_platform_device(&etnaviv_platform_device);
> platform_driver_unregister(&etnaviv_platform_driver);
> platform_driver_unregister(&etnaviv_gpu_driver);
> }
