[Intel-gfx] [PATCH 4/4] i915: fix remap_io_sg to verify the pgprot

[youling257]

This patch cause "x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x064a2000-0x064a2fff], got write-back" problem.
my 2GB ram Bay trail z3735f tablet runing on android-x86, "i915: fix remap_io_sg to verify the pgprot" cause this problem.

05-09 02:59:25.099     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x0640a000-0x0640dfff], got write-back
05-09 02:59:25.106  1440  1440 W hwc-gl-worker: EGL_ANDROID_native_fence_sync extension not supported
05-09 02:59:25.111     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x064a2000-0x064a2fff], got write-back
05-09 02:59:25.118     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x06400000-0x06404fff], got write-back
05-09 02:59:25.125     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x06405000-0x06408fff], got write-back
05-09 02:59:25.148  1440  1440 W hwc-gl-worker: EGL_ANDROID_native_fence_sync extension not supported
05-09 02:59:25.158     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x06542000-0x06542fff], got write-back
05-09 02:59:25.165     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x06499000-0x0649dfff], got write-back
05-09 02:59:25.171     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x0649e000-0x064a1fff], got write-back
05-09 02:59:25.177  1440  1440 W hwc-gl-worker: EGL_ANDROID_native_fence_sync extension not supported
05-09 02:59:25.183     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x065fa000-0x065fafff], got write-back
05-09 02:59:25.192     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x06539000-0x0653dfff], got write-back
05-09 02:59:25.199     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x0653e000-0x06541fff], got write-back
05-09 02:59:25.204  1440  1440 W hwc-gl-worker: EGL_ANDROID_native_fence_sync extension not supported
05-09 02:59:25.212     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x066a2000-0x066a2fff], got write-back
05-09 02:59:25.218     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x065f1000-0x065f5fff], got write-back
05-09 02:59:25.226     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x065f6000-0x065f9fff], got write-back


05-09 02:59:27.101     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x08a76000-0x08a76fff], got write-back
05-09 02:59:27.225     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x08a77000-0x08a7afff], got write-back
05-09 02:59:27.242     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x08bd0000-0x08bd0fff], got write-back
05-09 02:59:27.254     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x08bd1000-0x08bf0fff], got write-back
05-09 02:59:27.310  1440  1440 E drm-fb  : Failed to get handle from prime fd: 25
05-09 02:59:27.322     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x080d5000-0x080d9fff], got write-back
05-09 02:59:27.322     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x080da000-0x080ddfff], got write-back
05-09 02:59:27.338     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x1b830000-0x1b83ffff], got write-back
05-09 02:59:27.338     0     0 W x86/PAT : BootAnimation:1665 map pfn RAM range req write-combining for [mem 0x1b76a000-0x1b76efff], got write-back
05-09 02:59:27.344     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x07e87000-0x07e8bfff], got write-back
05-09 02:59:27.349     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x07e8c000-0x07e90fff], got write-back
05-09 02:59:27.347  1440  1440 E drm-fb  : Failed to get handle from prime fd: 25
05-09 02:59:27.361     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c123000-0x1c126fff], got write-back
05-09 02:59:27.361     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c127000-0x1c12afff], got write-back
05-09 02:59:27.362     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c12f000-0x1c13efff], got write-back
05-09 02:59:27.362     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c12b000-0x1c12efff], got write-back
05-09 02:59:27.364  1440  1440 E drm-fb  : Failed to get handle from prime fd: 25
05-09 02:59:27.377     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c140000-0x1c144fff], got write-back
05-09 02:59:27.377     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c145000-0x1c148fff], got write-back
05-09 02:59:27.378     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c14b000-0x1c14ffff], got write-back
05-09 02:59:27.379     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c151000-0x1c155fff], got write-back
05-09 02:59:27.377  1440  1440 E drm-fb  : Failed to get handle from prime fd: 25
05-09 02:59:27.393     0     0 W x86/PAT : surfaceflinger:1440 map pfn RAM range req write-combining for [mem 0x1c157000-0x1c15bfff], got write-back