linux-kernel - [PATCH 5.10 044/252] drm/amdgpu/vcn2.0: add cancel_delayed_work

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Message-Id: <20210531130659.488583452@linuxfoundation.org>
Date:   Mon, 31 May 2021 15:11:49 +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, James Zhu <James.Zhu@....com>,
        Leo Liu <leo.liu@....com>,
        Christian König <christian.koenig@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.10 044/252] drm/amdgpu/vcn2.0: add cancel_delayed_work_sync before power gate

From: James Zhu <James.Zhu@....com>

commit 0c6013377b4027e69d8f3e63b6bf556b6cb87802 upstream.

Add cancel_delayed_work_sync before set power gating state
to avoid race condition issue when power gating.

Signed-off-by: James Zhu <James.Zhu@....com>
Reviewed-by: Leo Liu <leo.liu@....com>
Acked-by: Christian König <christian.koenig@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c
@@ -262,6 +262,8 @@ static int vcn_v2_0_hw_fini(void *handle
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	cancel_delayed_work_sync(&adev->vcn.idle_work);
+
 	if ((adev->pg_flags & AMD_PG_SUPPORT_VCN_DPG) ||
 	    (adev->vcn.cur_state != AMD_PG_STATE_GATE &&
 	      RREG32_SOC15(VCN, 0, mmUVD_STATUS)))