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udev: fix uevent-helper disable

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Make sure that /proc/sys/kernel/hotplug exists before trying to disable
the uevent-helper mechanism.

Since kernel commit 86d56134f1b6 ("kobject: Make support for
uevent_helper optional.") the kernel can be built without uevent-helper
support. In this case /proc/sys/kernel/hotplug does not exist and the
current sysvinit script fails with

	/etc/rcS.d/S04udev: line 132: can't create /proc/sys/kernel/hotplug: nonexistent directory

when trying to disable the uevent-helper mechanism during boot.

Note that a single NULL-character has always been sufficient to disable.

(From OE-Core rev: f7b8445f2e89ad0a59c2859f9eb26855769f1070)

(From OE-Core rev: 8e666f643e6a8720ca604706afed91fba4096eef)

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Johan Hovold
2014-10-24 17:39:40 +02:00
committed by Richard Purdie
parent 044039dc8e
commit dda084e13c
1 changed files with 1 additions and 1 deletions
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2
meta/recipes-core/udev/udev/init
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@@ -99,7 +99,7 @@ case "$1" in
kill_udevd > "/dev/null" 2>&1
# trigger the sorted events
echo -e '\000\000\000\000' > /proc/sys/kernel/hotplug
[ -e /proc/sys/kernel/hotplug ] && echo -e '\000' >/proc/sys/kernel/hotplug
@UDEVD@ -d
udevadm control --env=STARTUP=1