drm/vmwgfx: fix the check when to use dma_alloc_coherent

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Since Linux 4.21 we merged the swiotlb ops into the DMA direct ops,
so they would always have a the sync_single methods.  But late in
the cicle we also removed the direct ops entirely, so we'd see NULL
DMA ops.  Switch vmw_dma_select_mode to only detect swiotlb presence
using swiotlb_nr_tbl() instead.

Fixes: 55897af630 ("dma-direct: merge swiotlb_dma_ops into the dma_direct code")
Fixes: 356da6d0cd ("dma-mapping: bypass indirect calls for dma-direct")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

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Christoph Hellwig 2019-01-05 09:01:07 +01:00 • committed by Thomas Hellstrom

parent 9b5bf2421b

commit 2b3cd6249b

1 changed files with 4 additions and 7 deletions

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drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

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