diff options
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 79f8b39..f6b6bfa 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -9,6 +9,7 @@ * * DMA uncached mapping support. */ +#include <linux/bootmem.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/gfp.h> @@ -162,6 +163,8 @@ static u64 get_coherent_dma_mask(struct device *dev) u64 mask = (u64)DMA_BIT_MASK(32); if (dev) { + unsigned long max_dma_pfn; + mask = dev->coherent_dma_mask; /* @@ -173,6 +176,8 @@ static u64 get_coherent_dma_mask(struct device *dev) return 0; } + max_dma_pfn = min(max_pfn, arm_dma_pfn_limit); + /* * If the mask allows for more memory than we can address, * and we actually have that much memory, then fail the @@ -180,7 +185,7 @@ static u64 get_coherent_dma_mask(struct device *dev) */ if (sizeof(mask) != sizeof(dma_addr_t) && mask > (dma_addr_t)~0 && - dma_to_pfn(dev, ~0) > arm_dma_pfn_limit) { + dma_to_pfn(dev, ~0) > max_dma_pfn) { dev_warn(dev, "Coherent DMA mask %#llx is larger than dma_addr_t allows\n", mask); dev_warn(dev, "Driver did not use or check the return value from dma_set_coherent_mask()?\n"); @@ -192,7 +197,7 @@ static u64 get_coherent_dma_mask(struct device *dev) * fits within the allowable addresses which we can * allocate. */ - if (dma_to_pfn(dev, mask) < arm_dma_pfn_limit) { + if (dma_to_pfn(dev, mask) < max_dma_pfn) { dev_warn(dev, "Coherent DMA mask %#llx (pfn %#lx-%#lx) covers a smaller range of system memory than the DMA zone pfn 0x0-%#lx\n", mask, dma_to_pfn(dev, 0), dma_to_pfn(dev, mask) + 1, |
