Patch "drm/amd: Flush GFXOFF requests in prepare stage" has been added to the 6.8-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/amd: Flush GFXOFF requests in prepare stage

to the 6.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-flush-gfxoff-requests-in-prepare-stage.patch
and it can be found in the queue-6.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit b1222a796ee965c013034f572b8eb8947147a7fd
Author: Mario Limonciello <mario.limonciello@xxxxxxx>
Date:   Wed Mar 20 13:32:21 2024 -0500

    drm/amd: Flush GFXOFF requests in prepare stage
    
    [ Upstream commit ca299b4512d4b4f516732a48ce9aa19d91f4473e ]
    
    If the system hasn't entered GFXOFF when suspend starts it can cause
    hangs accessing GC and RLC during the suspend stage.
    
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.1.y: 5095d5418193 ("drm/amd: Evict resources during PM ops prepare() callback")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.1.y: cb11ca3233aa ("drm/amd: Add concept of running prepare_suspend() sequence for IP blocks")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.1.y: 2ceec37b0e3d ("drm/amd: Add missing kernel doc for prepare_suspend()")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.1.y: 3a9626c816db ("drm/amd: Stop evicting resources on APUs in suspend")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.y: 5095d5418193 ("drm/amd: Evict resources during PM ops prepare() callback")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.y: cb11ca3233aa ("drm/amd: Add concept of running prepare_suspend() sequence for IP blocks")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.y: 2ceec37b0e3d ("drm/amd: Add missing kernel doc for prepare_suspend()")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.6.y: 3a9626c816db ("drm/amd: Stop evicting resources on APUs in suspend")
    Cc: <stable@xxxxxxxxxxxxxxx> # 6.1+
    Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3132
    Fixes: ab4750332dbe ("drm/amdgpu/sdma5.2: add begin/end_use ring callbacks")
    Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 94bdb5fa6ebc6..1fbaf7b81d69a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4524,6 +4524,8 @@ int amdgpu_device_prepare(struct drm_device *dev)
 	if (r)
 		goto unprepare;
 
+	flush_delayed_work(&adev->gfx.gfx_off_delay_work);
+
 	for (i = 0; i < adev->num_ip_blocks; i++) {
 		if (!adev->ip_blocks[i].status.valid)
 			continue;