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virtio_ring: enable premapped mode whatever use_dma_api

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Now, we have virtio DMA APIs, the driver can be the premapped
mode whatever the virtio core uses dma api or not.

So remove the limit of checking use_dma_api from
virtqueue_set_dma_premapped().

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20240511031404.30903-2-xuanzhuo@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Xuan Zhuo 2024-05-11 11:14:01 +08:00 committed by Jakub Kicinski
parent 6e62702feb
commit f9dac92ba9
1 changed files with 1 additions and 6 deletions
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7
drivers/virtio/virtio_ring.c
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@ -2782,7 +2782,7 @@ EXPORT_SYMBOL_GPL(virtqueue_resize);
*
* Returns zero or a negative error.
* 0: success.
* -EINVAL: vring does not use the dma api, so we can not enable premapped mode.
* -EINVAL: too late to enable premapped mode, the vq already contains buffers.
*/
int virtqueue_set_dma_premapped(struct virtqueue *_vq)
{
@ -2798,11 +2798,6 @@ int virtqueue_set_dma_premapped(struct virtqueue *_vq)
return -EINVAL;
}
if (!vq->use_dma_api) {
END_USE(vq);
return -EINVAL;
}
vq->premapped = true;
vq->do_unmap = false;