From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
commit a309320ddbac6b1583224fcb6bacd424bcf8637f upstream.
Two return statements in sbi_cpuidle_dt_init_states() did not drop the
OF node reference count. Solve the issue and simplify entire error
handling with scoped/cleanup.h.
Fixes: 6abf32f1d9c5 ("cpuidle: Add RISC-V SBI CPU idle driver")
Cc: All applicable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx>
Link: https://patch.msgid.link/20240820094023.61155-1-krzysztof.kozlowski@xxxxxxxxxx
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/cpuidle/cpuidle-riscv-sbi.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
--- a/drivers/cpuidle/cpuidle-riscv-sbi.c
+++ b/drivers/cpuidle/cpuidle-riscv-sbi.c
@@ -8,6 +8,7 @@
#define pr_fmt(fmt) "cpuidle-riscv-sbi: " fmt
+#include <linux/cleanup.h>
#include <linux/cpuhotplug.h>
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
@@ -236,19 +237,16 @@ static int sbi_cpuidle_dt_init_states(st
{
struct sbi_cpuidle_data *data = per_cpu_ptr(&sbi_cpuidle_data, cpu);
struct device_node *state_node;
- struct device_node *cpu_node;
u32 *states;
int i, ret;
- cpu_node = of_cpu_device_node_get(cpu);
+ struct device_node *cpu_node __free(device_node) = of_cpu_device_node_get(cpu);
if (!cpu_node)
return -ENODEV;
states = devm_kcalloc(dev, state_count, sizeof(*states), GFP_KERNEL);
- if (!states) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!states)
+ return -ENOMEM;
/* Parse SBI specific details from state DT nodes */
for (i = 1; i < state_count; i++) {
@@ -264,10 +262,8 @@ static int sbi_cpuidle_dt_init_states(st
pr_debug("sbi-state %#x index %d\n", states[i], i);
}
- if (i != state_count) {
- ret = -ENODEV;
- goto fail;
- }
+ if (i != state_count)
+ return -ENODEV;
/* Initialize optional data, used for the hierarchical topology. */
ret = sbi_dt_cpu_init_topology(drv, data, state_count, cpu);
@@ -277,10 +273,7 @@ static int sbi_cpuidle_dt_init_states(st
/* Store states in the per-cpu struct. */
data->states = states;
-fail:
- of_node_put(cpu_node);
-
- return ret;
+ return 0;
}
static void sbi_cpuidle_deinit_cpu(int cpu)
Patches currently in stable-queue which might be from krzysztof.kozlowski@xxxxxxxxxx are
queue-6.10/reset-k210-fix-of-node-leak-in-probe-error-path.patch
queue-6.10/dt-bindings-spi-nxp-fspi-add-imx8ulp-support.patch
queue-6.10/power-supply-axp20x_battery-remove-design-from-min-a.patch
queue-6.10/arm-dts-imx6ul-geam-fix-fsl-pins-property-in-tscgrp-pinctrl.patch
queue-6.10/arm64-dts-exynos-exynos7885-jackpotlte-correct-ram-a.patch
queue-6.10/soc-versatile-integrator-fix-of-node-leak-in-probe-error-path.patch
queue-6.10/reset-berlin-fix-of-node-leak-in-probe-error-path.patch
queue-6.10/iio-magnetometer-ak8975-drop-incorrect-ak09116-compa.patch
queue-6.10/bus-integrator-lm-fix-of-node-leak-in-probe.patch
queue-6.10/power-supply-max17042_battery-fix-soc-threshold-calc.patch
queue-6.10/arm-versatile-fix-of-node-leak-in-cpus-prepare.patch
queue-6.10/dt-bindings-iio-asahi-kasei-ak8975-drop-incorrect-ak.patch
queue-6.10/arm-dts-imx7d-zii-rmu2-fix-ethernet-phy-pinctrl-prop.patch
queue-6.10/arm-dts-imx6ull-seeed-npi-fix-fsl-pins-property-in-tscgrp-pinctrl.patch
queue-6.10/cpuidle-riscv-sbi-use-scoped-device-node-handling-to-fix-missing-of_node_put.patch
