Commit 87a2b65f authored Sep 12, 2018 by David Lechner Committed by Sebastian Reichel Sep 16, 2018

power: supply: sysfs: ratelimit property read error message

This adds rate limiting to the message that is printed when reading a
power supply property via sysfs returns an error. This will prevent
userspace applications from unintentionally dDOSing the system by
continuously reading a property that returns an error.

Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

parent ae6fe7a3

drivers/power/supply/power_supply_sysfs.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -131,7 +131,8 @@ static ssize_t power_supply_show_property(struct device *dev,
		dev_dbg(dev, "driver has no data for `%s' property\n",
		attr->attr.name);
		else if (ret != -ENODEV && ret != -EAGAIN)
		dev_err(dev, "driver failed to report `%s' property: %zd\n",
		dev_err_ratelimited(dev,
		"driver failed to report `%s' property: %zd\n",
		attr->attr.name, ret);
		return ret;
		}

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