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Driver core: warn when userspace writes to the uevent file in a non-supported way

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In the future we will allow the uevent type to be written to the uevent
file to trigger the different types of uevents.  But for now, as we only
support the ADD event, warn if userspace tries to write anything else to
this file.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Kay Sievers 2007-04-06 01:40:38 +02:00 committed by Greg Kroah-Hartman
parent 16574dccd8
commit 22af74f3b2
1 changed files with 3 additions and 0 deletions
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drivers/base/core.c
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@ -296,6 +296,9 @@ static ssize_t show_uevent(struct device *dev, struct device_attribute *attr,
static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
if (memcmp(buf, "add", 3) != 0)
dev_err(dev, "uevent: unsupported action-string; this will "
"be ignored in a future kernel version");
kobject_uevent(&dev->kobj, KOBJ_ADD);
return count;
}