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| H A D | videobuf-dma-contig.c | diff b3dc3f8e49577840dc8ac8a365c5b3da4edb10b8 Wed Dec 18 04:39:07 CST 2019 Christoph Hellwig <hch@lst.de> media: videobuf-dma-contig: use dma_mmap_coherent
dma_alloc_coherent does not return a physical address, but a DMA address,
which might be remapped or have an offset. Passing the DMA address to
vm_iomap_memory is thus broken.
Use the proper dma_mmap_coherent helper instead, and stop passing
__GFP_COMP to dma_alloc_coherent, as the memory management inside the
DMA allocator is hidden from the callers and does not require it.
With this the gfp_t argument to __videobuf_dc_alloc can be removed and
hard coded to GFP_KERNEL.
Fixes: a8f3c203e19b ("[media] videobuf-dma-contig: add cache support")
Signed-off-by: Christoph Hellwig <hch@lst.de>
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