From: David Lechner <da...@lechnology.com>
[ Upstream commit 87a2b65fc855e6be50f791c2ebbb492541896827 ]
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 <da...@lechnology.com>
Signed-off-by: Sebastian Reichel <sebastian.reic...@collabora.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/power/supply/power_supply_sysfs.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/power/supply/power_supply_sysfs.c
b/drivers/power/supply/power_supply_sysfs.c
index eb5dc74820539..2ccaf4ff4be47 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -91,7 +91,8 @@ 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;
}
--
2.20.1
