diff options
| -rw-r--r-- | kernel/dma/direct.c | 39 |
1 files changed, 20 insertions, 19 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index f5ecadd4e1c1..eddcb70251c9 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -147,6 +147,22 @@ again: return page; } +static void *dma_direct_alloc_from_pool(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) +{ + struct page *page; + u64 phys_mask; + void *ret; + + gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask, + &phys_mask); + page = dma_alloc_from_pool(dev, size, &ret, gfp, dma_coherent_ok); + if (!page) + return NULL; + *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); + return ret; +} + void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { @@ -163,17 +179,8 @@ void *dma_direct_alloc(struct device *dev, size_t size, if (attrs & DMA_ATTR_NO_WARN) gfp |= __GFP_NOWARN; - if (dma_should_alloc_from_pool(dev, gfp, attrs)) { - u64 phys_mask; - - gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask, - &phys_mask); - page = dma_alloc_from_pool(dev, size, &ret, gfp, - dma_coherent_ok); - if (!page) - return NULL; - goto done; - } + if (dma_should_alloc_from_pool(dev, gfp, attrs)) + return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); /* we always manually zero the memory once we are done */ page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO); @@ -298,13 +305,8 @@ struct page *dma_direct_alloc_pages(struct device *dev, size_t size, struct page *page; void *ret; - if (dma_should_alloc_from_pool(dev, gfp, 0)) { - page = dma_alloc_from_pool(dev, size, &ret, gfp, - dma_coherent_ok); - if (!page) - return NULL; - goto done; - } + if (dma_should_alloc_from_pool(dev, gfp, 0)) + return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); page = __dma_direct_alloc_pages(dev, size, gfp); if (!page) @@ -327,7 +329,6 @@ struct page *dma_direct_alloc_pages(struct device *dev, size_t size, goto out_free_pages; } memset(ret, 0, size); -done: *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); return page; out_free_pages: |