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The imported buffer may be released from its origin allocator, I would suggest to use the new file descriptor from new ion handle. NOTE: User may use file descriptor outside mpp as buffer index. If mpp chooses new map fd as its output user may lost the connection between user external buffer and mpp output buffer. Change-Id: Ie0f42cd3268dfd08ddcbd5148a68406ff4b66b7a Signed-off-by: Randy Li <randy.li@rock-chips.com> Signed-off-by: ayaka <ayaka@soulik.info> Signed-off-by: Herman Chen <herman.chen@rock-chips.com>