Devices that are forced to DMA through unencrypted bounce buffers need to be treated as if they are addressing limited.
Signed-off-by: Christoph Hellwig <[email protected]> --- kernel/dma/mapping.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 1dbe6d725962..f6c35b53d996 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -416,6 +416,8 @@ EXPORT_SYMBOL_GPL(dma_get_merge_boundary); */ bool dma_addressing_limited(struct device *dev) { + if (force_dma_unencrypted(dev)) + return true; return min_not_zero(dma_get_mask(dev), dev->bus_dma_limit) < dma_get_required_mask(dev); } -- 2.20.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
