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| author | Takashi Iwai <tiwai@suse.de> | 2018-04-15 11:08:07 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-04-23 14:43:27 +0200 |
| commit | 504a918e6714b551b7b39940dbab32610fafa1fe (patch) | |
| tree | 1354fe047d8f5bd3f27f1567683e94de8252c691 /lib | |
| parent | Linux 4.17-rc2 (diff) | |
| download | linux-504a918e6714b551b7b39940dbab32610fafa1fe.tar.xz linux-504a918e6714b551b7b39940dbab32610fafa1fe.zip | |
dma-direct: don't retry allocation for no-op GFP_DMA
When an allocation with lower dma_coherent mask fails, dma_direct_alloc()
retries the allocation with GFP_DMA. But, this is useless for
architectures that hav no ZONE_DMA.
Fix it by adding the check of CONFIG_ZONE_DMA before retrying the
allocation.
Fixes: 95f183916d4b ("dma-direct: retry allocations using GFP_DMA for small masks")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/dma-direct.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/dma-direct.c b/lib/dma-direct.c index c0bba30fef0a..bbfb229aa067 100644 --- a/lib/dma-direct.c +++ b/lib/dma-direct.c @@ -84,7 +84,8 @@ again: __free_pages(page, page_order); page = NULL; - if (dev->coherent_dma_mask < DMA_BIT_MASK(32) && + if (IS_ENABLED(CONFIG_ZONE_DMA) && + dev->coherent_dma_mask < DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) { gfp = (gfp & ~GFP_DMA32) | GFP_DMA; goto again; |