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authorMaciej Sosnowski <maciej.sosnowski@intel.com>2009-04-23 12:31:51 +0200
committerDan Williams <dan.j.williams@intel.com>2009-05-12 14:41:47 -0700
commit4f005dbe5584fe54c9f6d6d4f0acd3fb29be84da (patch)
treed9a4add9553af6c50fae59a79e9ab217945a7090 /drivers/char
parentca50a51e890b0a62b44b5642c1ba5049909e5a8b (diff)
ioatdma: fix "ioatdma frees DMA memory with wrong function"
as reported by Alexander Beregalov <a.beregalov@gmail.com> ioatdma 0000:00:08.0: DMA-API: device driver frees DMA memory with wrong function [device address=0x000000007f76f800] [size=2000 bytes] [map ped as single] [unmapped as page] The ioatdma driver was unmapping all regions (either allocated as page or single) using unmap_page. This patch lets dma driver recognize if unmap_single or unmap_page should be used. It introduces two new dma control flags: DMA_COMPL_SRC_UNMAP_SINGLE and DMA_COMPL_DEST_UNMAP_SINGLE. They should be set to indicate dma driver to do dma-unmapping as single (first one for the source, tha latter for the destination). If respective flag is not set, the driver assumes dma-unmapping as page. Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Reported-by: Alexander Beregalov <a.beregalov@gmail.com> Tested-by: Alexander Beregalov <a.beregalov@gmail.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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