linux-kernel - RE: [PATCH 3/3] udmabuf: Use module_misc

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Date: Wed, 24 Jan 2024 22:37:36 +0000
From: "Kasireddy, Vivek" <vivek.kasireddy@...el.com>
To: Andrew Davis <afd@...com>, Gerd Hoffmann <kraxel@...hat.com>, Sumit Semwal
	<sumit.semwal@...aro.org>, Christian König
	<christian.koenig@....com>, Paul Cercueil <paul@...pouillou.net>
CC: "linaro-mm-sig@...ts.linaro.org" <linaro-mm-sig@...ts.linaro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>
Subject: RE: [PATCH 3/3] udmabuf: Use module_misc_device() to register this
 device

Acked-by: Vivek Kasireddy <vivek.kasireddy@...el.com>

> 
> Now that we do not need to call dma_coerce_mask_and_coherent() on our
> miscdevice device, use the module_misc_device() helper for registering and
> module init/exit.
> 
> Signed-off-by: Andrew Davis <afd@...com>
> ---
>  drivers/dma-buf/udmabuf.c | 30 +-----------------------------
>  1 file changed, 1 insertion(+), 29 deletions(-)
> 
> diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index
> ab6764322523c..3028ac3fd9f6a 100644
> --- a/drivers/dma-buf/udmabuf.c
> +++ b/drivers/dma-buf/udmabuf.c
> @@ -392,34 +392,6 @@ static struct miscdevice udmabuf_misc = {
>  	.name           = "udmabuf",
>  	.fops           = &udmabuf_fops,
>  };
> -
> -static int __init udmabuf_dev_init(void) -{
> -	int ret;
> -
> -	ret = misc_register(&udmabuf_misc);
> -	if (ret < 0) {
> -		pr_err("Could not initialize udmabuf device\n");
> -		return ret;
> -	}
> -
> -	ret = dma_coerce_mask_and_coherent(udmabuf_misc.this_device,
> -					   DMA_BIT_MASK(64));
> -	if (ret < 0) {
> -		pr_err("Could not setup DMA mask for udmabuf device\n");
> -		misc_deregister(&udmabuf_misc);
> -		return ret;
> -	}
> -
> -	return 0;
> -}
> -
> -static void __exit udmabuf_dev_exit(void) -{
> -	misc_deregister(&udmabuf_misc);
> -}
> -
> -module_init(udmabuf_dev_init)
> -module_exit(udmabuf_dev_exit)
> +module_misc_device(udmabuf_misc);
> 
>  MODULE_AUTHOR("Gerd Hoffmann <kraxel@...hat.com>");
> --
> 2.39.2