linux-kernel - Re: [PATCH] virtio-mmio: Use to_virtio_mmio

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Date:   Wed, 10 Feb 2021 16:09:44 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Tang Bin <tangbin@...s.chinamobile.com>, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] virtio-mmio: Use to_virtio_mmio_device() to simply code


On 2021/2/10 上午11:04, Tang Bin wrote:
> The file virtio_mmio.c has defined the function to_virtio_mmio_device,
> so use it instead of container_of() to simply code. And remove
> superfluous blank lines in this file.
>
> Signed-off-by: Tang Bin <tangbin@...s.chinamobile.com>
> ---
>   drivers/virtio/virtio_mmio.c | 16 +---------------
>   1 file changed, 1 insertion(+), 15 deletions(-)
>
> diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
> index 627ac0487..449d0f209 100644
> --- a/drivers/virtio/virtio_mmio.c
> +++ b/drivers/virtio/virtio_mmio.c
> @@ -69,14 +69,10 @@
>   #include <uapi/linux/virtio_mmio.h>
>   #include <linux/virtio_ring.h>
>   
> -
> -


It's better not mix the patch with style changes.

Other looks good.

Thanks


>   /* The alignment to use between consumer and producer parts of vring.
>    * Currently hardcoded to the page size. */
>   #define VIRTIO_MMIO_VRING_ALIGN		PAGE_SIZE
>   
> -
> -
>   #define to_virtio_mmio_device(_plat_dev) \
>   	container_of(_plat_dev, struct virtio_mmio_device, vdev)
>   
> @@ -100,8 +96,6 @@ struct virtio_mmio_vq_info {
>   	struct list_head node;
>   };
>   
> -
> -
>   /* Configuration interface */
>   
>   static u64 vm_get_features(struct virtio_device *vdev)
> @@ -264,8 +258,6 @@ static void vm_reset(struct virtio_device *vdev)
>   	writel(0, vm_dev->base + VIRTIO_MMIO_STATUS);
>   }
>   
> -
> -
>   /* Transport interface */
>   
>   /* the notify function used when creating a virt queue */
> @@ -307,8 +299,6 @@ static irqreturn_t vm_interrupt(int irq, void *opaque)
>   	return ret;
>   }
>   
> -
> -
>   static void vm_del_vq(struct virtqueue *vq)
>   {
>   	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vq->vdev);
> @@ -512,13 +502,11 @@ static const struct virtio_config_ops virtio_mmio_config_ops = {
>   	.bus_name	= vm_bus_name,
>   };
>   
> -
>   static void virtio_mmio_release_dev(struct device *_d)
>   {
>   	struct virtio_device *vdev =
>   			container_of(_d, struct virtio_device, dev);
> -	struct virtio_mmio_device *vm_dev =
> -			container_of(vdev, struct virtio_mmio_device, vdev);
> +	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
>   	struct platform_device *pdev = vm_dev->pdev;
>   
>   	devm_kfree(&pdev->dev, vm_dev);
> @@ -608,8 +596,6 @@ static int virtio_mmio_remove(struct platform_device *pdev)
>   	return 0;
>   }
>   
> -
> -
>   /* Devices list parameter */
>   
>   #if defined(CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES)