[PATCH 5.15.y] drm/amdgpu/gfx6: fix firmware leak on teardown

[Sasha Levin <sashal@kernel.org>]

From: Willian Oliveira <williandossantosdeoliveira287@gmail.com>

[ Upstream commit cc172e177795c5f87bc2d71768d077e1c10633e8 ]

The firmware requested in gfx_v6_0_init_microcode() is not released
when the GFX block is torn down, leaking the firmware resources.

Add gfx_v6_0_free_microcode() and call it from gfx_v6_0_sw_fini()
to release the PFP, ME, CE and RLC firmware.

Signed-off-by: Willian Oliveira <williandossantosdeoliveira287@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 386e81346f95ab0be5a82c5535de932e7a456924)
Cc: stable@vger.kernel.org
[ sashal: Replaced unavailable amdgpu_ucode_release() calls with inline release_firmware() and pointer clearing in gfx_v6_0_sw_fini(). ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
index 8f9a2e9c276ae..8d894a55c5d1c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v6_0.c
@@ -3222,6 +3222,15 @@ static int gfx_v6_0_sw_fini(void *handle)
 
 	amdgpu_gfx_rlc_fini(adev);
 
+	release_firmware(adev->gfx.pfp_fw);
+	adev->gfx.pfp_fw = NULL;
+	release_firmware(adev->gfx.me_fw);
+	adev->gfx.me_fw = NULL;
+	release_firmware(adev->gfx.ce_fw);
+	adev->gfx.ce_fw = NULL;
+	release_firmware(adev->gfx.rlc_fw);
+	adev->gfx.rlc_fw = NULL;
+
 	return 0;
 }
 
-- 
2.53.0