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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Longlong Yao <Longlong.Yao@amd.com>,
        Guchun Chen <guchun.chen@amd.com>,
        Feifei Xu <Feifei.Xu@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Sasha Levin <sashal@kernel.org>, christian.koenig@amd.com,
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        Hawking.Zhang@amd.com, mario.limonciello@amd.com,
        lijo.lazar@amd.com, candice.li@amd.com, Lyndon.Li@amd.com,
        srinivasan.shanmugam@amd.com, katrinzhou@tencent.com,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: [PATCH AUTOSEL 6.4 04/58] drm/amdgpu: fix calltrace warning in amddrm_buddy_fini
Date:   Sun, 23 Jul 2023 21:12:32 -0400
Message-Id: <20230724011338.2298062-4-sashal@kernel.org>
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From: Longlong Yao <Longlong.Yao@amd.com>

[ Upstream commit 01382501509871d0799bab6bd412c228486af5bf ]

The following call trace is observed when removing the amdgpu driver, which
is caused by that BOs allocated for psp are not freed until removing.

[61811.450562] RIP: 0010:amddrm_buddy_fini.cold+0x29/0x47 [amddrm_buddy]
[61811.450577] Call Trace:
[61811.450577]  <TASK>
[61811.450579]  amdgpu_vram_mgr_fini+0x135/0x1c0 [amdgpu]
[61811.450728]  amdgpu_ttm_fini+0x207/0x290 [amdgpu]
[61811.450870]  amdgpu_bo_fini+0x27/0xa0 [amdgpu]
[61811.451012]  gmc_v9_0_sw_fini+0x4a/0x60 [amdgpu]
[61811.451166]  amdgpu_device_fini_sw+0x117/0x520 [amdgpu]
[61811.451306]  amdgpu_driver_release_kms+0x16/0x30 [amdgpu]
[61811.451447]  devm_drm_dev_init_release+0x4d/0x80 [drm]
[61811.451466]  devm_action_release+0x15/0x20
[61811.451469]  release_nodes+0x40/0xb0
[61811.451471]  devres_release_all+0x9b/0xd0
[61811.451473]  __device_release_driver+0x1bb/0x2a0
[61811.451476]  driver_detach+0xf3/0x140
[61811.451479]  bus_remove_driver+0x6c/0xf0
[61811.451481]  driver_unregister+0x31/0x60
[61811.451483]  pci_unregister_driver+0x40/0x90
[61811.451486]  amdgpu_exit+0x15/0x447 [amdgpu]

For smu v13_0_2, if the GPU supports xgmi, refer to

commit f5c7e7797060 ("drm/amdgpu: Adjust removal control flow for smu v13_0_2"),

it will run gpu recover in AMDGPU_RESET_FOR_DEVICE_REMOVE mode when removing,
which makes all devices in hive list have hw reset but no resume except the
basic ip blocks, then other ip blocks will not call .hw_fini according to
ip_block.status.hw.

Since psp_free_shared_bufs just includes some software operations, so move
it to psp_sw_fini.

Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Longlong Yao <Longlong.Yao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index a150b7a4b4aae..fc58a51cb0c00 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -520,6 +520,8 @@ static int psp_sw_fini(void *handle)
 	kfree(cmd);
 	cmd = NULL;
 
+	psp_free_shared_bufs(psp);
+
 	if (psp->km_ring.ring_mem)
 		amdgpu_bo_free_kernel(&adev->firmware.rbuf,
 				      &psp->km_ring.ring_mem_mc_addr,
@@ -2655,8 +2657,6 @@ static int psp_hw_fini(void *handle)
 
 	psp_ring_destroy(psp, PSP_RING_TYPE__KM);
 
-	psp_free_shared_bufs(psp);
-
 	return 0;
 }
 
-- 
2.39.2