diff options
author | Robin Murphy <robin.murphy@arm.com> | 2017-01-10 17:51:17 +0000 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-01 08:33:13 +0100 |
commit | 776050a9b55e17b72b5684794b9580d72e920e17 (patch) | |
tree | d59368fb4c8390177a238be8cab07a8829c9fab7 /include/linux/fpga/fpga-mgr.h | |
parent | 143a9ad4e68cc5c210e6e99e910d6b77cc8a9ec5 (diff) |
virtio_mmio: Set DMA masks appropriately
commit f7f6634d23830ff74335734fbdb28ea109c1f349 upstream.
Once DMA API usage is enabled, it becomes apparent that virtio-mmio is
inadvertently relying on the default 32-bit DMA mask, which leads to
problems like rapidly exhausting SWIOTLB bounce buffers.
Ensure that we set the appropriate 64-bit DMA mask whenever possible,
with the coherent mask suitably limited for the legacy vring as per
a0be1db4304f ("virtio_pci: Limit DMA mask to 44 bits for legacy virtio
devices").
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Fixes: b42111382f0e ("virtio_mmio: Use the DMA API if enabled")
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/fpga/fpga-mgr.h')
0 files changed, 0 insertions, 0 deletions