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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-23 11:44:20 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-23 11:44:20 -0800 |
| commit | 59d2c635f6cfb0a8c7e5acb06b10c4e587fbfd1a (patch) | |
| tree | 4749767462bf7c6735094e659479de45a573445c | |
| parent | e3b862ed893bf030ebdd78ead99647374a2cfd47 (diff) | |
| parent | 3622b86f49f84e52fb41fee9eb55f9290613dfc3 (diff) | |
| download | linux-59d2c635f6cfb0a8c7e5acb06b10c4e587fbfd1a.tar.bz2 | |
Merge tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
"Fix up the sound code to not pass __GFP_COMP to the non-coherent DMA
allocator, as it copes with that just as badly as the coherent
allocator, and then add a check to make sure no one passes the flag
ever again"
* tag 'dma-mapping-2022-12-23' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: reject GFP_COMP for noncoherent allocations
ALSA: memalloc: don't use GFP_COMP for non-coherent dma allocations
| -rw-r--r-- | kernel/dma/mapping.c | 4 | ||||
| -rw-r--r-- | sound/core/memalloc.c | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index c026a5a5e046..68106e3791f6 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -560,6 +560,8 @@ static struct page *__dma_alloc_pages(struct device *dev, size_t size, return NULL; if (WARN_ON_ONCE(gfp & (__GFP_DMA | __GFP_DMA32 | __GFP_HIGHMEM))) return NULL; + if (WARN_ON_ONCE(gfp & __GFP_COMP)) + return NULL; size = PAGE_ALIGN(size); if (dma_alloc_direct(dev, ops)) @@ -645,6 +647,8 @@ struct sg_table *dma_alloc_noncontiguous(struct device *dev, size_t size, if (WARN_ON_ONCE(attrs & ~DMA_ATTR_ALLOC_SINGLE_PAGES)) return NULL; + if (WARN_ON_ONCE(gfp & __GFP_COMP)) + return NULL; if (ops && ops->alloc_noncontiguous) sgt = ops->alloc_noncontiguous(dev, size, dir, gfp, attrs); diff --git a/sound/core/memalloc.c b/sound/core/memalloc.c index 3cf5a87d69ea..81025f50a542 100644 --- a/sound/core/memalloc.c +++ b/sound/core/memalloc.c @@ -542,7 +542,7 @@ static void *snd_dma_noncontig_alloc(struct snd_dma_buffer *dmab, size_t size) void *p; sgt = dma_alloc_noncontiguous(dmab->dev.dev, size, dmab->dev.dir, - DEFAULT_GFP | __GFP_COMP, 0); + DEFAULT_GFP, 0); #ifdef CONFIG_SND_DMA_SGBUF if (!sgt && !get_dma_ops(dmab->dev.dev)) { if (dmab->dev.type == SNDRV_DMA_TYPE_DEV_WC_SG) @@ -820,7 +820,7 @@ static void *snd_dma_noncoherent_alloc(struct snd_dma_buffer *dmab, size_t size) void *p; p = dma_alloc_noncoherent(dmab->dev.dev, size, &dmab->addr, - dmab->dev.dir, DEFAULT_GFP | __GFP_COMP); + dmab->dev.dir, DEFAULT_GFP); if (p) dmab->dev.need_sync = dma_need_sync(dmab->dev.dev, dmab->addr); return p; |