dsp: ion: unmap DMA buffer after kernel ion map failure
DMA buffer does not unmap after kernel ion map failure. It leads
to unexpected vaddr and memory leak.
Change-Id: I363dd9178a0bcbca601180bfd0a7bd7ef2430d3e
Signed-off-by:
Xiaojun Sang <xsang@codeaurora.org>
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