[Intel-gfx] [PATCH] drm/i915: Drop expectations of VM_IO from our GGTT mmappings

[Chris Wilson]

We don't really want to use VM_IO for our GGTT mmaps (it implies that
the mmap contains memory mapped registers, which we do not expose) yet I
overzealously added it to an assert just because that's how we always
had setup the vma.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Abdiel Janulgue <abdiel.janulgue at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_mm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_mm.c b/drivers/gpu/drm/i915/i915_mm.c
index c23bb29e6d3e..318562ce64c0 100644
--- a/drivers/gpu/drm/i915/i915_mm.c
+++ b/drivers/gpu/drm/i915/i915_mm.c
@@ -63,9 +63,8 @@ int remap_io_mapping(struct vm_area_struct *vma,
 	struct remap_pfn r;
 	int err;
 
-	GEM_BUG_ON((vma->vm_flags &
-		    (VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP)) !=
-		   (VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP));
+#define EXPECTED_FLAGS (VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP)
+	GEM_BUG_ON((vma->vm_flags & EXPECTED_FLAGS) != EXPECTED_FLAGS);
 
 	/* We rely on prevalidation of the io-mapping to skip track_pfn(). */
 	r.mm = vma->vm_mm;
-- 
2.23.0.rc1