Re: [PATCH v2 1/2] dma: call unconditionally to unmap_page and unmap_sg callbacks

[Christoph Hellwig]

On Wed, Jul 17, 2024 at 03:37:10PM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@xxxxxxxxxx>
> 
> Almost all users of ->map_page()/map_sg() callbacks implement
> ->unmap_page()/unmap_sg() callbacks too. One user which doesn't do it,
> is dummy DMA ops interface, and the use of this interface is to fail
> the operation and in such case, there won't be any call to
> ->unmap_page()/unmap_sg().
> 
> This patch removes the existence checks of ->unmap_page()/unmap_sg()
> and calls to it directly to create symmetrical interface to
> ->map_page()/map_sg().

I don't think you even need this any more, do you?