From: Nirmoy Das nirmoy.das@intel.com
commit e92eb246feb9019b0b137706c934b8891cdfe3c2 upstream.
debug_active_activate() expected ref->count to be zero which is not true anymore as __i915_active_activate() calls debug_active_activate() after incrementing the count.
v2: No need to check for "ref->count == 1" as __i915_active_activate() already make sure of that(Janusz).
Fixes: 04240e30ed06 ("drm/i915: Skip taking acquire mutex for no ref->active callback") Cc: Chris Wilson chris@chris-wilson.co.uk Cc: Tvrtko Ursulin tvrtko.ursulin@intel.com Cc: Thomas Hellström thomas.hellstrom@intel.com Cc: Andi Shyti andi.shyti@linux.intel.com Cc: intel-gfx@lists.freedesktop.org Cc: Janusz Krzysztofik janusz.krzysztofik@linux.intel.com Cc: stable@vger.kernel.org # v5.10+ Signed-off-by: Nirmoy Das nirmoy.das@intel.com Reviewed-by: Janusz Krzysztofik janusz.krzysztofik@linux.intel.com Reviewed-by: Andrzej Hajda andrzej.hajda@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20230313114613.9874-1-nirmoy.d... (cherry picked from commit bfad380c542438a9b642f8190b7fd37bc77e2723) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/i915_active.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/i915_active.c +++ b/drivers/gpu/drm/i915/i915_active.c @@ -92,8 +92,7 @@ static void debug_active_init(struct i91 static void debug_active_activate(struct i915_active *ref) { lockdep_assert_held(&ref->tree_lock); - if (!atomic_read(&ref->count)) /* before the first inc */ - debug_object_activate(ref, &active_debug_desc); + debug_object_activate(ref, &active_debug_desc); }
static void debug_active_deactivate(struct i915_active *ref)