msm: kgsl: verify user memory permissions before mapping to GPU drive
Change-Id: I9260705c7a51a13b95004946024f1fcd6a032463 Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/243314 Reviewed-by: Tom Chu <tom_chu@asus.com> Tested-by: Tom Chu <tom_chu@asus.com>
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