[PATCH] drm/i915/gvt: fix the usage of ww lock in gvt scheduler.
Zhi A Wang
zhi.wang.linux2 at gmail.com
Thu Aug 26 14:38:34 UTC 2021
As the APIs related to ww lock in i915 was changed recently, the usage of
ww lock in GVT-g scheduler needs to be changed accrodingly. We noticed a
deadlock when GVT-g scheduler submits the workload to i915. After some
investigation, it seems the way of how to use ww lock APIs has been
changed. Releasing a ww now requires a explict i915_gem_ww_ctx_fini().
Fixes: 67f1120381df ("drm/i915/gvt: Introduce per object locking in GVT scheduler.")
Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
Signed-off-by: Zhi A Wang <zhi.a.wang at intel.com>
---
drivers/gpu/drm/i915/gvt/scheduler.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index 9578e57db4c2..43fedfe9639a 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -576,7 +576,7 @@ static int prepare_shadow_batch_buffer(struct intel_vgpu_workload *workload)
/* No one is going to touch shadow bb from now on. */
i915_gem_object_flush_map(bb->obj);
- i915_gem_object_unlock(bb->obj);
+ i915_gem_ww_ctx_fini(&ww);
}
}
return 0;
@@ -630,7 +630,7 @@ static int prepare_shadow_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
return ret;
}
- i915_gem_object_unlock(wa_ctx->indirect_ctx.obj);
+ i915_gem_ww_ctx_fini(&ww);
/* FIXME: we are not tracking our pinned VMA leaving it
* up to the core to fix up the stray pin_count upon
--
2.25.1
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