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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2007-05-08 00:31:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:14 -0700 |
| commit | b247e8aaf2837715d31eb25828fa8b4eb0a659cd (patch) | |
| tree | b796caad363353128d47da9beefb9df10014ae64 | |
| parent | f19b121e21c1b032f6c612d2b9b499151f7b661b (diff) | |
| download | op-kernel-dev-b247e8aaf2837715d31eb25828fa8b4eb0a659cd.zip op-kernel-dev-b247e8aaf2837715d31eb25828fa8b4eb0a659cd.tar.gz | |
dma_declare_coherent_memory wrong allocation
dma_declare_coherent_memory() allocates a bitmap 1 bit per page, it
calculates the bitmap size based on size of long, but allocates bytes...
Thanks to James Bottomley for clarifications and corrections.
Signed-off-by: G. Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: James Bottomley <James.Bottomley@SteelEye.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/cris/arch-v32/drivers/pci/dma.c | 2 | ||||
| -rw-r--r-- | arch/i386/kernel/pci-dma.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/cris/arch-v32/drivers/pci/dma.c b/arch/cris/arch-v32/drivers/pci/dma.c index 70d3bf0..832fc63 100644 --- a/arch/cris/arch-v32/drivers/pci/dma.c +++ b/arch/cris/arch-v32/drivers/pci/dma.c @@ -76,7 +76,7 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, { void __iomem *mem_base; int pages = size >> PAGE_SHIFT; - int bitmap_size = (pages + 31)/32; + int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long); if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0) goto out; diff --git a/arch/i386/kernel/pci-dma.c b/arch/i386/kernel/pci-dma.c index 3ebcea0..30b754f 100644 --- a/arch/i386/kernel/pci-dma.c +++ b/arch/i386/kernel/pci-dma.c @@ -77,7 +77,7 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, { void __iomem *mem_base = NULL; int pages = size >> PAGE_SHIFT; - int bitmap_size = (pages + 31)/32; + int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long); if ((flags & (DMA_MEMORY_MAP | DMA_MEMORY_IO)) == 0) goto out; |
