linux-kernel - [PATCH AUTOSEL 5.15 119/188] drm/amd/amdgpu: fix psp tmr bo pin count leak in SRIOV

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Date:   Mon, 17 Jan 2022 21:30:43 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Jingwen Chen <Jingwen.Chen2@....com>,
        Horace Chen <horace.chen@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, christian.koenig@....com,
        Xinhui.Pan@....com, airlied@...ux.ie, daniel@...ll.ch,
        Hawking.Zhang@....com, john.clements@....com, candice.li@....com,
        lijo.lazar@....com, lang.yu@....com, Oak.Zeng@....com,
        jonathan.kim@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.15 119/188] drm/amd/amdgpu: fix psp tmr bo pin count leak in SRIOV

From: Jingwen Chen <Jingwen.Chen2@....com>

[ Upstream commit 85dfc1d692c9434c37842e610be37cd4ae4e0081 ]

[Why]
psp tmr bo will be pinned during loading amdgpu and reset in SRIOV while
only unpinned in unload amdgpu

[How]
add amdgpu_in_reset and sriov judgement to skip pin bo

v2: fix wrong judgement

Signed-off-by: Jingwen Chen <Jingwen.Chen2@....com>
Reviewed-by: Horace Chen <horace.chen@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 9b41cb8c3de54..86e2090bbd6e0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -2207,12 +2207,16 @@ static int psp_hw_start(struct psp_context *psp)
 		return ret;
 	}
 
+	if (amdgpu_sriov_vf(adev) && amdgpu_in_reset(adev))
+		goto skip_pin_bo;
+
 	ret = psp_tmr_init(psp);
 	if (ret) {
 		DRM_ERROR("PSP tmr init failed!\n");
 		return ret;
 	}
 
+skip_pin_bo:
 	/*
 	 * For ASICs with DF Cstate management centralized
 	 * to PMFW, TMR setup should be performed after PMFW
-- 
2.34.1