FAILED: patch "[PATCH] drm/amdgpu/jpeg2.5: add cancel_delayed_work_sync before power" failed to apply to 5.12-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 5.12-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 23f10a571da5eaa63b7845d16e2f49837e841ab9 Mon Sep 17 00:00:00 2001
From: James Zhu <James.Zhu@amd.com>
Date: Wed, 19 May 2021 12:04:38 -0400
Subject: [PATCH] drm/amdgpu/jpeg2.5: add cancel_delayed_work_sync before power
 gate
MIME-Version: 1.0
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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@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
index 938ef4ce5b76..46096ad7f0d9 100644
--- a/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
+++ b/drivers/gpu/drm/amd/amdgpu/jpeg_v2_5.c
@@ -187,14 +187,14 @@ static int jpeg_v2_5_hw_init(void *handle)
 static int jpeg_v2_5_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-	struct amdgpu_ring *ring;
 	int i;
 
+	cancel_delayed_work_sync(&adev->vcn.idle_work);
+
 	for (i = 0; i < adev->jpeg.num_jpeg_inst; ++i) {
 		if (adev->jpeg.harvest_config & (1 << i))
 			continue;
 
-		ring = &adev->jpeg.inst[i].ring_dec;
 		if (adev->jpeg.cur_state != AMD_PG_STATE_GATE &&
 		      RREG32_SOC15(JPEG, i, mmUVD_JRBC_STATUS))
 			jpeg_v2_5_set_powergating_state(adev, AMD_PG_STATE_GATE);