linux-kernel - [PATCH 4.15 091/168] drm/amd/powerplay: fix memory leakage when reload (v2)

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Date:   Wed, 11 Apr 2018 00:23:53 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Yintian Tao <yttao@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.15 091/168] drm/amd/powerplay: fix memory leakage when reload (v2)

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yintian Tao <yttao@....com>


[ Upstream commit a25513e7b9b15c318ec44113682e988829aef746 ]

add smu_free_memory when smu fini to prevent memory leakage

v2: squash in typo fix (Yintian) and warning (Harry)

Signed-off-by: Yintian Tao <yttao@....com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/smu7_smumgr.c
@@ -648,6 +648,12 @@ int smu7_init(struct pp_hwmgr *hwmgr)
 
 int smu7_smu_fini(struct pp_hwmgr *hwmgr)
 {
+	struct smu7_smumgr *smu_data = (struct smu7_smumgr *)(hwmgr->smu_backend);
+
+	smu_free_memory(hwmgr->device, (void *) smu_data->header_buffer.handle);
+	if (!cgs_is_virtualization_enabled(hwmgr->device))
+		smu_free_memory(hwmgr->device, (void *) smu_data->smu_buffer.handle);
+
 	kfree(hwmgr->smu_backend);
 	hwmgr->smu_backend = NULL;
 	cgs_rel_firmware(hwmgr->device, CGS_UCODE_ID_SMU);