Commit 2ca30331 authored by Dan Carpenter's avatar Dan Carpenter Committed by Rafael J. Wysocki

PM / QoS: return -EINVAL for bogus strings

In the current code, if the user accidentally writes a bogus command to
this sysfs file, then we set the latency tolerance to an uninitialized
variable.

Fixes: 2d984ad1 (PM / QoS: Introcuce latency tolerance device PM QoS type)
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Cc: 3.15+ <stable@vger.kernel.org> # 3.15+
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent dbb1d8b7
...@@ -272,6 +272,8 @@ static ssize_t pm_qos_latency_tolerance_store(struct device *dev, ...@@ -272,6 +272,8 @@ static ssize_t pm_qos_latency_tolerance_store(struct device *dev,
value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT;
else if (!strcmp(buf, "any") || !strcmp(buf, "any\n")) else if (!strcmp(buf, "any") || !strcmp(buf, "any\n"))
value = PM_QOS_LATENCY_ANY; value = PM_QOS_LATENCY_ANY;
else
return -EINVAL;
} }
ret = dev_pm_qos_update_user_latency_tolerance(dev, value); ret = dev_pm_qos_update_user_latency_tolerance(dev, value);
return ret < 0 ? ret : n; return ret < 0 ? ret : n;
......
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