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| author | James Harper <james.harper@ejbdigital.com.au> | 2014-06-12 05:53:38 -0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <m.chehab@samsung.com> | 2014-07-26 10:33:15 -0400 |
| commit | 7b4eeed174b71c325705ff8c53f333bc79d0ee7a (patch) | |
| tree | 3f23ad213911ab98dd30694109c6c0bcfe17afd7 /drivers/media/v4l2-core/videobuf2-memops.c | |
| parent | b601fe5688ae285693c64e833003c14acb38378a (diff) | |
[media] vmalloc_sg: make sure all pages in vmalloc area are really DMA-ready
Patch originally written by Konrad. Rebased on current linux media tree.
Under Xen, vmalloc_32() isn't guaranteed to return pages which are really
under 4G in machine physical addresses (only in virtual pseudo-physical
addresses). To work around this, implement a vmalloc variant which
allocates each page with dma_alloc_coherent() to guarantee that each
page is suitable for the device in question.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: James Harper <james.harper@ejbdigital.com.au>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Diffstat (limited to 'drivers/media/v4l2-core/videobuf2-memops.c')
0 files changed, 0 insertions, 0 deletions