Messages in this thread Patch in this message | | | From | David Lechner <> | Subject | [PATCH] power_supply: sysfs: ratelimit property read error message | Date | Wed, 12 Sep 2018 19:48:30 -0500 |
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This adds ratelimiting 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 continuosuly reading a property that returns an error.
Signed-off-by: David Lechner <david@lechnology.com> --- 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 6170ed8b6854..dce24f596160 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -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; } -- 2.17.1
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