linux-kernel - [PATCH v2] arch_topology: Fix putting invalid cpu clk

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Date:   Tue, 17 Mar 2020 14:33:08 +0800
From:   Jeffy Chen <jeffy.chen@...k-chips.com>
To:     linux-kernel@...r.kernel.org
Cc:     anders.roxell@...aro.org, arnd@...db.de, sboyd@...nel.org,
        gregkh@...uxfoundation.org, naresh.kamboju@...aro.org,
        daniel.lezcano@...aro.org, Basil.Eljuse@....com,
        mturquette@...libre.com, Jeffy Chen <jeffy.chen@...k-chips.com>,
        Sudeep Holla <sudeep.holla@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: [PATCH v2] arch_topology: Fix putting invalid cpu clk

Add a sanity check before putting the cpu clk.

Fixes: b8fe128dad8f (“arch_topology: Adjust initial CPU capacities with current freq")
Signed-off-by: Jeffy Chen <jeffy.chen@...k-chips.com>
---

Changes in v2:
Correct fixes commit's commit id

 drivers/base/arch_topology.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 8a9fe2bc8635..4d0a0038b476 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -176,11 +176,11 @@ bool __init topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu)
 		 * frequency (by keeping the initial freq_factor value).
 		 */
 		cpu_clk = of_clk_get(cpu_node, 0);
-		if (!PTR_ERR_OR_ZERO(cpu_clk))
+		if (!PTR_ERR_OR_ZERO(cpu_clk)) {
 			per_cpu(freq_factor, cpu) =
 				clk_get_rate(cpu_clk) / 1000;
-
-		clk_put(cpu_clk);
+			clk_put(cpu_clk);
+		}
 	} else {
 		if (raw_capacity) {
 			pr_err("cpu_capacity: missing %pOF raw capacity\n",
-- 
2.11.0