[PATCH 6.1 241/417] drm/amd/pm/smu7: fix a memleak in smu7_hwmgr_backend_init

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

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

From: Zhipeng Lu <alexious@xxxxxxxxxx>

[ Upstream commit 2f3be3ca779b11c332441b10e00443a2510f4d7b ]

The hwmgr->backend, (i.e. data) allocated by kzalloc is not freed in
the error-handling paths of smu7_get_evv_voltages and
smu7_update_edc_leakage_table. However, it did be freed in the
error-handling of phm_initializa_dynamic_state_adjustment_rule_settings,
by smu7_hwmgr_backend_fini. So the lack of free in smu7_get_evv_voltages
and smu7_update_edc_leakage_table is considered a memleak in this patch.

Fixes: 599a7e9fe1b6 ("drm/amd/powerplay: implement smu7 hwmgr to manager asics with smu ip version 7.")
Fixes: 8f0804c6b7d0 ("drm/amd/pm: add edc leakage controller setting")
Signed-off-by: Zhipeng Lu <alexious@xxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
index a31a62a1ce0b..5e9410117712 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
@@ -2987,6 +2987,8 @@ static int smu7_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
 		result = smu7_get_evv_voltages(hwmgr);
 		if (result) {
 			pr_info("Get EVV Voltage Failed.  Abort Driver loading!\n");
+			kfree(hwmgr->backend);
+			hwmgr->backend = NULL;
 			return -EINVAL;
 		}
 	} else {
@@ -3032,8 +3034,10 @@ static int smu7_hwmgr_backend_init(struct pp_hwmgr *hwmgr)
 	}
 
 	result = smu7_update_edc_leakage_table(hwmgr);
-	if (result)
+	if (result) {
+		smu7_hwmgr_backend_fini(hwmgr);
 		return result;
+	}
 
 	return 0;
 }
-- 
2.43.0







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