On 3/16/2023 5:59 PM, Nirmoy Das wrote:

From: Chris Wilson chris.p.wilson@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@intel.com Cc: Daniele Ceraolo Spurio daniele.ceraolospurio@intel.com Cc: Andi Shyti andi.shyti@linux.intel.com Cc: Matthew Brost matthew.brost@intel.com Cc: John Harrison John.C.Harrison@Intel.com Signed-off-by: Chris Wilson chris.p.wilson@linux.intel.com Cc: stable@vger.kernel.org # v5.16+ Signed-off-by: Nirmoy Das nirmoy.das@intel.com

Reviewed-by: Nirmoy Das nirmoy.das@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; }