hwmon: (pwm-fan) Check return value from devm_add_action_or_reset

devm_add_action_or_reset() can fail due to a memory allocation failure.
Check for it and return the error if that happens.

Fixes: 37bcec5d9f71 ("hwmon: (pwm-fan) Use devm_thermal_of_cooling_device_register")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 08c9b9f1c16e..54c0ff00d67f 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -320,8 +320,10 @@ static int pwm_fan_probe(struct platform_device *pdev)
                         dev_err(dev, "Failed to enable fan supply: %d\n", ret);
                         return ret;
                 }
-                devm_add_action_or_reset(dev, pwm_fan_regulator_disable,
-                                         ctx->reg_en);
+                ret = devm_add_action_or_reset(dev, pwm_fan_regulator_disable,
+                                               ctx->reg_en);
+                if (ret)
+                        return ret;
         }
 
         ctx->pwm_value = MAX_PWM;
@@ -337,7 +339,9 @@ static int pwm_fan_probe(struct platform_device *pdev)
                 return ret;
         }
         timer_setup(&ctx->rpm_timer, sample_timer, 0);
-        devm_add_action_or_reset(dev, pwm_fan_pwm_disable, ctx);
+        ret = devm_add_action_or_reset(dev, pwm_fan_pwm_disable, ctx);
+        if (ret)
+                return ret;
 
         of_property_read_u32(dev->of_node, "pulses-per-revolution", &ppr);
         ctx->pulses_per_revolution = ppr;