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 <hch@xxxxxx>
---
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
