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| author | Qais Yousef <qais.yousef@imgtec.com> | 2015-12-11 13:41:09 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-12-12 10:15:34 -0800 |
| commit | 9530d0fe129c0197d5df13319ccefd08a827383b (patch) | |
| tree | dd1f94143c0bd097a3d9d8faca08bea984262ac1 | |
| parent | 2d33fa1059da4c8e816627a688d950b613ec0474 (diff) | |
| download | linux-rpi3-9530d0fe129c0197d5df13319ccefd08a827383b.tar.gz linux-rpi3-9530d0fe129c0197d5df13319ccefd08a827383b.tar.bz2 linux-rpi3-9530d0fe129c0197d5df13319ccefd08a827383b.zip | |
MIPS: fix DMA contiguous allocation
Recent changes to how GFP_ATOMIC is defined seems to have broken the
condition to use mips_alloc_from_contiguous() in
mips_dma_alloc_coherent().
I couldn't bottom out the exact change but I think it's this commit
d0164adc89f6 ("mm, page_alloc: distinguish between being unable to
sleep, unwilling to sleep and avoiding waking kswapd").
GFP_ATOMIC has multiple bits set and the check for !(gfp & GFP_ATOMIC)
isn't enough.
The reason behind this condition is to check whether we can potentially
do a sleeping memory allocation. Use gfpflags_allow_blocking() instead
which should be more robust.
Signed-off-by: Qais Yousef <qais.yousef@imgtec.com>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/mips/mm/dma-default.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index d8117be729a2..730d394ce5f0 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -145,7 +145,7 @@ static void *mips_dma_alloc_coherent(struct device *dev, size_t size, gfp = massage_gfp_flags(dev, gfp); - if (IS_ENABLED(CONFIG_DMA_CMA) && !(gfp & GFP_ATOMIC)) + if (IS_ENABLED(CONFIG_DMA_CMA) && gfpflags_allow_blocking(gfp)) page = dma_alloc_from_contiguous(dev, count, get_order(size)); if (!page) |