linux-kernel - [PATCH AUTOSEL 6.6 18/20] cpufreq: amd-pstate: fix memory leak on CPU EPP exit

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Message-ID: <20240605115225.2963242-18-sashal@kernel.org>
Date: Wed,  5 Jun 2024 07:52:01 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Peng Ma <andypma@...cent.com>,
	Mario Limonciello <mario.limonciello@....com>,
	Perry Yuan <Perry.Yuan@....com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	ray.huang@....com,
	gautham.shenoy@....com,
	rafael@...nel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH AUTOSEL 6.6 18/20] cpufreq: amd-pstate: fix memory leak on CPU EPP exit

From: Peng Ma <andypma@...cent.com>

[ Upstream commit cea04f3d9aeebda9d9c063c0dfa71e739c322c81 ]

The cpudata memory from kzalloc() in amd_pstate_epp_cpu_init() is
not freed in the analogous exit function, so fix that.

Signed-off-by: Peng Ma <andypma@...cent.com>
Acked-by: Mario Limonciello <mario.limonciello@....com>
Reviewed-by: Perry Yuan <Perry.Yuan@....com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/cpufreq/amd-pstate.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 07f3419954396..3efc2aef31ce4 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1216,6 +1216,13 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_policy *policy)
 
 static int amd_pstate_epp_cpu_exit(struct cpufreq_policy *policy)
 {
+	struct amd_cpudata *cpudata = policy->driver_data;
+
+	if (cpudata) {
+		kfree(cpudata);
+		policy->driver_data = NULL;
+	}
+
 	pr_debug("CPU %d exiting\n", policy->cpu);
 	return 0;
 }
-- 
2.43.0