drm/radeon/kms: IB locking dumps out a lockdep ordering issue
We sometimes lock IB then the ring and sometimes the ring then
the IB. This is mostly due to the IB locking not being well defined
about what data in the structs it actually locks. Define what I
believe is the correct behaviour and gets rid of the lock dep ordering
warning.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 99292be..ff9e417 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -402,6 +402,10 @@
uint32_t length_dw;
};
+/*
+ * locking -
+ * mutex protects scheduled_ibs, ready, alloc_bm
+ */
struct radeon_ib_pool {
struct mutex mutex;
struct radeon_object *robj;