tree 7caa598949f83f65e0965f0a1f9a321f5b7c5d21
parent 1a428fd2f8c09d1942c0b729d5a6ba4b727f8f50
author jeron <jeron.susan@hi-p.com> 1469598101 +0800
committer Teemu Hukkanen <teemu@fairphone.com> 1472200465 +0200

FPII-2231: Elevation of privilege vulnerability in Qualcomm components CVE-2015-8943 ANDROID-28815158

msm: mdss: Unmap only when buffer was mapped
Currently buffer is unmapped if iommu is attached.
This can lead to potential unmap issues if wrong addresses are sent and are tried to unmap without mapping.
Hence ensure unmap is done only when buffer is mapped.
CR#794217, CR#836226

Change-Id: I9741a85c3ec8a9c1094e921eb62ccb9493f48f45