Commit 6717f7c3 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/selftests: Lock the drm_mm as we search 



Hold onto the vm->mutex (to lock the drm_mm) to ensure that the rbtree
is stable as we search it for our scratch node.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200128183458.3860022-1-chris@chris-wilson.co.uk
parent 0543fbf4

drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c

+6 −3
Original line number Diff line number Diff line
@@ -1465,9 +1465,12 @@ out_file: 


static int check_scratch(struct i915_address_space *vm, u64 offset)

{

	struct drm_mm_node *node =

		__drm_mm_interval_first(&vm->mm,

	struct drm_mm_node *node;



	mutex_lock(&vm->mutex);

	node = __drm_mm_interval_first(&vm->mm,

				       offset, offset + sizeof(u32) - 1);

	mutex_unlock(&vm->mutex);

	if (!node || node->start > offset)

		return 0;

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