From 3b4eb36899eaa92a48e1466aa61d0437c891529c Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Thu, 31 Mar 2022 22:46:50 +0200
Subject: drm/sched: Check locking in drm_sched_job_add_implicit_dependencies
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Git-commit: b892d39199df8daa2ce6e65a111f5a15be58ae5b
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
You really need to hold the reservation here or all kinds of funny
things can happen between grabbing the dependencies and inserting the
new fences.
v2: Fix commit summary (Christian)
Acked-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Luben Tuikov <luben.tuikov@amd.com>
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220331204651.2699107-4-daniel.vetter@ffwll.ch
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/scheduler/sched_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index b81fceb0b8a2..c5660b066554 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -703,6 +703,8 @@ int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
struct dma_fence *fence;
int ret;
+ dma_resv_assert_held(obj->resv);
+
dma_resv_for_each_fence(&cursor, obj->resv, write, fence) {
/* Make sure to grab an additional ref on the added fence */
dma_fence_get(fence);
--
2.38.1