[Intel-gfx] [PATCH] drm/i915/gem: Flush lmem contents after construction

[Nirmoy Das]

From: Chris Wilson <chris.p.wilson at linux.intel.com>

i915_gem_object_create_lmem_from_data() lacks the flush of the data
written to lmem to ensure the object is marked as dirty and the writes
flushed to the backing store. Once created, we can immediately release
the obj->mm.mapping caching of the vmap.

Fixes: 7acbbc7cf485 ("drm/i915/guc: put all guc objects in lmem when available")
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Andi Shyti <andi.shyti at linux.intel.com>
Cc: Matthew Brost <matthew.brost at intel.com>
Cc: John Harrison <John.C.Harrison at Intel.com>
Signed-off-by: Chris Wilson <chris.p.wilson at linux.intel.com>
Cc: <stable at vger.kernel.org> # v5.16+
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_lmem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c
index 8949fb0a944f..3198b64ad7db 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_lmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_lmem.c
@@ -127,7 +127,8 @@ i915_gem_object_create_lmem_from_data(struct drm_i915_private *i915,
 
 	memcpy(map, data, size);
 
-	i915_gem_object_unpin_map(obj);
+	i915_gem_object_flush_map(obj);
+	__i915_gem_object_release_map(obj);
 
 	return obj;
 }
-- 
2.39.0