diff options
| author | Chris Wilson <[email protected]> | 2020-03-12 11:53:07 +0000 |
|---|---|---|
| committer | Chris Wilson <[email protected]> | 2020-03-12 20:47:24 +0000 |
| commit | 22ca8a452e5791c9721e1ba61e95651fc00a9e4d (patch) | |
| tree | 953585168e57acde72c5e3496d13db44f19cd53e | |
| parent | c46c320c02d041cb793f22550d4fc5a03d209205 (diff) | |
drm/i915/gt: Wait for RCUs frees before asserting idle on unload
During driver unload, we have many asserts that we have released our
bookkeeping structs and are idle. In some cases, these struct are
protected by RCU and we do not release them until after an RCU grace
period.
Reported-by: Maarten Lankhorst <[email protected]>
Fixes: 130a95e9098e ("drm/i915/gem: Consolidate ctx->engines[] release")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Tvrtko Ursulin <[email protected]>
Cc: Mika Kuoppala <[email protected]>
Reviewed-by: Tvrtko Ursulin <[email protected]>
Reviewed-by: Mika Kuoppala <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
| -rw-r--r-- | drivers/gpu/drm/i915/gem/i915_gem_context.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_gt.c | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 895cedc3f023..026999b34abd 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -903,6 +903,7 @@ void i915_gem_init__contexts(struct drm_i915_private *i915) void i915_gem_driver_release__contexts(struct drm_i915_private *i915) { flush_work(&i915->gem.contexts.free_work); + rcu_barrier(); /* and flush the left over RCU frees */ } static int gem_context_register(struct i915_gem_context *ctx, diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index 3dea8881e915..d09f7596cb98 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -667,6 +667,9 @@ void intel_gt_driver_release(struct intel_gt *gt) void intel_gt_driver_late_release(struct intel_gt *gt) { + /* We need to wait for inflight RCU frees to release their grip */ + rcu_barrier(); + intel_uc_driver_late_release(>->uc); intel_gt_fini_requests(gt); intel_gt_fini_reset(gt); |