linux-kernel - Re: [PATCH V5 5/9] virtio_ring: rename dma_handle to map

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Message-ID: <CAJaqyWdu=V1AMWf1nDF8v4fZMnZGriRGeJ8ksOPLqNEOpRK5ww@mail.gmail.com>
Date: Wed, 13 Aug 2025 09:47:26 +0200
From: Eugenio Perez Martin <eperezma@...hat.com>
To: Jason Wang <jasowang@...hat.com>
Cc: mst@...hat.com, xuanzhuo@...ux.alibaba.com, virtualization@...ts.linux.dev, 
	linux-kernel@...r.kernel.org, hch@...radead.org, 
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH V5 5/9] virtio_ring: rename dma_handle to map_handle

On Wed, Aug 13, 2025 at 7:49 AM Jason Wang <jasowang@...hat.com> wrote:
>
> Following patch will introduce virtio map opreations which means the
> address is not necessarily used for DMA. Let's rename the dma_handle
> to map_handle first.
>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Reviewed-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>

Reviewed-by: Eugenio Pérez <eperezma@...hat.com>

> Signed-off-by: Jason Wang <jasowang@...hat.com>
> ---
>  drivers/virtio/virtio_ring.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index fb1d407d5f1b..94b2a8f3acc2 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -305,18 +305,18 @@ size_t virtio_max_dma_size(const struct virtio_device *vdev)
>  EXPORT_SYMBOL_GPL(virtio_max_dma_size);
>
>  static void *vring_alloc_queue(struct virtio_device *vdev, size_t size,
> -                              dma_addr_t *dma_handle, gfp_t flag,
> +                              dma_addr_t *map_handle, gfp_t flag,
>                                union vring_mapping_token *mapping_token)
>  {
>         if (vring_use_map_api(vdev)) {
>                 return dma_alloc_coherent(mapping_token->dma_dev, size,
> -                                         dma_handle, flag);
> +                                         map_handle, flag);
>         } else {
>                 void *queue = alloc_pages_exact(PAGE_ALIGN(size), flag);
>
>                 if (queue) {
>                         phys_addr_t phys_addr = virt_to_phys(queue);
> -                       *dma_handle = (dma_addr_t)phys_addr;
> +                       *map_handle = (dma_addr_t)phys_addr;
>
>                         /*
>                          * Sanity check: make sure we dind't truncate
> @@ -329,7 +329,7 @@ static void *vring_alloc_queue(struct virtio_device *vdev, size_t size,
>                          * warning and abort if we end up with an
>                          * unrepresentable address.
>                          */
> -                       if (WARN_ON_ONCE(*dma_handle != phys_addr)) {
> +                       if (WARN_ON_ONCE(*map_handle != phys_addr)) {
>                                 free_pages_exact(queue, PAGE_ALIGN(size));
>                                 return NULL;
>                         }
> @@ -339,11 +339,11 @@ static void *vring_alloc_queue(struct virtio_device *vdev, size_t size,
>  }
>
>  static void vring_free_queue(struct virtio_device *vdev, size_t size,
> -                            void *queue, dma_addr_t dma_handle,
> +                            void *queue, dma_addr_t map_handle,
>                              union vring_mapping_token *mapping_token)
>  {
>         if (vring_use_map_api(vdev))
> -               dma_free_coherent(mapping_token->dma_dev, size, queue, dma_handle);
> +               dma_free_coherent(mapping_token->dma_dev, size, queue, map_handle);
>         else
>                 free_pages_exact(queue, PAGE_ALIGN(size));
>  }
> --
> 2.31.1
>