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authorXuelin Shi <xuelin.shi@freescale.com>2014-05-21 14:02:37 -0700
committerDan Williams <dan.j.williams@intel.com>2014-05-21 14:02:37 -0700
commitc1f43dd9c20d85e66c4d77e284f64ac114abe3f8 (patch)
treeee4ff99c2742b037071435d9dc0423eb3650da51 /include
parent5a9a55bf9157d3490b0c8c4c81d4708602c26e07 (diff)
dmaengine: fix dmaengine_unmap failure
The count which is used to get_unmap_data maybe not the same as the count computed in dmaengine_unmap which causes to free data in a wrong pool. This patch fixes this issue by keeping the map count with unmap_data structure and use this count to get the pool. Cc: <stable@vger.kernel.org> Signed-off-by: Xuelin Shi <xuelin.shi@freescale.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/dmaengine.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 8300fb87b84a..72cb0ddb9678 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -429,6 +429,7 @@ typedef bool (*dma_filter_fn)(struct dma_chan *chan, void *filter_param);
typedef void (*dma_async_tx_callback)(void *dma_async_param);
struct dmaengine_unmap_data {
+ u8 map_cnt;
u8 to_cnt;
u8 from_cnt;
u8 bidi_cnt;