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Diffstat (limited to 'arch/x86/kernel/pci-dma.c')
-rw-r--r--arch/x86/kernel/pci-dma.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index c5ef1af8e79d..dc00a1331ace 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -378,6 +378,7 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
378 struct page *page; 378 struct page *page;
379 unsigned long dma_mask = 0; 379 unsigned long dma_mask = 0;
380 dma_addr_t bus; 380 dma_addr_t bus;
381 int noretry = 0;
381 382
382 /* ignore region specifiers */ 383 /* ignore region specifiers */
383 gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32); 384 gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
@@ -397,20 +398,25 @@ dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
397 if (dev->dma_mask == NULL) 398 if (dev->dma_mask == NULL)
398 return NULL; 399 return NULL;
399 400
400 /* Don't invoke OOM killer */ 401 /* Don't invoke OOM killer or retry in lower 16MB DMA zone */
401 gfp |= __GFP_NORETRY; 402 if (gfp & __GFP_DMA)
403 noretry = 1;
402 404
403#ifdef CONFIG_X86_64 405#ifdef CONFIG_X86_64
404 /* Why <=? Even when the mask is smaller than 4GB it is often 406 /* Why <=? Even when the mask is smaller than 4GB it is often
405 larger than 16MB and in this case we have a chance of 407 larger than 16MB and in this case we have a chance of
406 finding fitting memory in the next higher zone first. If 408 finding fitting memory in the next higher zone first. If
407 not retry with true GFP_DMA. -AK */ 409 not retry with true GFP_DMA. -AK */
408 if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) 410 if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA)) {
409 gfp |= GFP_DMA32; 411 gfp |= GFP_DMA32;
412 if (dma_mask < DMA_32BIT_MASK)
413 noretry = 1;
414 }
410#endif 415#endif
411 416
412 again: 417 again:
413 page = dma_alloc_pages(dev, gfp, get_order(size)); 418 page = dma_alloc_pages(dev,
419 noretry ? gfp | __GFP_NORETRY : gfp, get_order(size));
414 if (page == NULL) 420 if (page == NULL)
415 return NULL; 421 return NULL;
416 422