linux-kernel - [PATCH 5.7 33/79] drm/nouveau/kms/tu102: wait for core update to complete when assigning windows

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Message-Id: <20200810151813.925318979@linuxfoundation.org>
Date:   Mon, 10 Aug 2020 17:20:52 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Ben Skeggs <bskeggs@...hat.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.7 33/79] drm/nouveau/kms/tu102: wait for core update to complete when assigning windows

From: Ben Skeggs <bskeggs@...hat.com>

[ Upstream commit 705d9d022949e3cdae82d89db6a8fc773eb23dad ]

Fixes a race on Turing between the core cross-channel error checks and
the following window update.

Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 2625ed84fc44d..5835d19e1c45f 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -2041,7 +2041,7 @@ nv50_disp_atomic_commit_tail(struct drm_atomic_state *state)
 	 */
 	if (core->assign_windows) {
 		core->func->wndw.owner(core);
-		core->func->update(core, interlock, false);
+		nv50_disp_atomic_commit_core(state, interlock);
 		core->assign_windows = false;
 		interlock[NV50_DISP_INTERLOCK_CORE] = 0;
 	}
-- 
2.25.1