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authorDaniel Mentz <danielmentz@google.com>2015-12-16 02:38:48 +0100
committerDan Williams <dan.j.williams@intel.com>2015-12-16 20:24:26 +0100
commit0354aec19ce3d355c6213b0434064efc25c9b22c (patch)
treed428458458507a455257e0eec6c92ab5917e50df /Documentation/wimax
parentRevert "scatterlist: use sg_phys()" (diff)
downloadlinux-0354aec19ce3d355c6213b0434064efc25c9b22c.tar.xz
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dma-debug: Fix dma_debug_entry offset calculation
dma-debug uses struct dma_debug_entry to keep track of dma coherent memory allocation requests. The virtual address is converted into a pfn and an offset. Previously, the offset was calculated using an incorrect bit mask. As a result, we saw incorrect error messages from dma-debug like the following: "DMA-API: exceeded 7 overlapping mappings of cacheline 0x03e00000" Cacheline 0x03e00000 does not exist on our platform. Cc: <stable@vger.kernel.org> Fixes: 0abdd7a81b7e ("dma-debug: introduce debug_dma_assert_idle()") Signed-off-by: Daniel Mentz <danielmentz@google.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'Documentation/wimax')
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