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authorChris Wilson <chris@chris-wilson.co.uk>2020-01-28 19:34:58 +0100
committerChris Wilson <chris@chris-wilson.co.uk>2020-01-28 20:00:13 +0100
commit6717f7c32b33c2b13627dce309400abe7ac68392 (patch)
treee1e337777e5f713f61c868b28f2dbb4db46e51bf /drivers/gpu/drm/i915/gem/selftests
parentdrm/i915/trace: i915_request.prio is a signed value (diff)
downloadlinux-6717f7c32b33c2b13627dce309400abe7ac68392.tar.xz
linux-6717f7c32b33c2b13627dce309400abe7ac68392.zip
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: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200128183458.3860022-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gem/selftests')
-rw-r--r--drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
index 130c4c522686..375d864736f3 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
@@ -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,
- offset, offset + sizeof(u32) - 1);
+ 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;