Hi Matt, On Thursday, 15 September 2022 00:04:24 CEST Matt Roper wrote: > From: Chris Wilson <[email protected]> > > If we abort driver initialisation in the middle of gt/engine discovery, > some engines will be fully setup and some not. Those incompletely setup > engines only have 'engine->release == NULL' and so will leak any of the > common objects allocated. > > Signed-off-by: Chris Wilson <[email protected]> > Cc: Janusz Krzysztofik <[email protected]> > Signed-off-by: Matt Roper <[email protected]> > --- > drivers/gpu/drm/i915/gt/intel_engine_cs.c | 16 +++++++++++++--- > 1 file changed, 13 insertions(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c > b/drivers/gpu/drm/i915/gt/intel_engine_cs.c > index 1f7188129cd1..bff12b4ec314 100644 > --- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c > +++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c > @@ -1196,6 +1196,12 @@ void intel_engine_destroy_pinned_context(struct > intel_context *ce) > intel_context_put(ce); > } > > +static void destroy_pinned_context(struct intel_context *ce) > +{ > + if (ce) > + intel_engine_destroy_pinned_context(ce); > +} > + > static struct intel_context * > create_kernel_context(struct intel_engine_cs *engine) > { > @@ -1274,8 +1280,13 @@ int intel_engines_init(struct intel_gt *gt) > return err; > > err = setup(engine); > - if (err) > + if (err) { > + intel_engine_cleanup_common(engine); > return err; > + } > + > + /* The backend should now be responsible for cleanup */ > + GEM_BUG_ON(engine->release == NULL);
LGTM > > err = engine_init_common(engine); > if (err) > @@ -1307,8 +1318,7 @@ void intel_engine_cleanup_common(struct intel_engine_cs > *engine) > if (engine->default_state) > fput(engine->default_state); > > - if (engine->kernel_context) > - intel_engine_destroy_pinned_context(engine->kernel_context); > + destroy_pinned_context(engine->kernel_context); I think there is no point for this hunk, and consequently for the first one. A version of intel_engine_destroy_pinned_context() that accepts NULL can be added later, when we see need for similar code optimisation in more places, if ever. Thanks, Janusz > > GEM_BUG_ON(!llist_empty(&engine->barrier_tasks)); > cleanup_status_page(engine); >
