On 12.05.21 22:18, Stefano Stabellini wrote:
> From: Christoph Hellwig <hch@lst.de>
> 
> Although SWIOTLB_NO_FORCE is meant to allow later calls to swiotlb_init,
> today dma_direct_map_page returns error if SWIOTLB_NO_FORCE.
> 
> For now, without a larger overhaul of SWIOTLB_NO_FORCE, the best we can
> do is to avoid setting SWIOTLB_NO_FORCE in mem_init when we know that it
> is going to be required later (e.g. Xen requires it).
> 
> CC: boris.ostrovsky@oracle.com
> CC: jgross@suse.com
> CC: catalin.marinas@arm.com
> CC: will@kernel.org
> CC: linux-arm-kernel@lists.infradead.org
> Fixes: 2726bf3ff252 ("swiotlb: Make SWIOTLB_NO_FORCE perform no allocation")
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>

Reviewed-by: Juergen Gross <jgross@suse.com>


Juergen