initramfs-live-boot: Make sure we kill udev before switching root when live booting

When live booting, we need to make sure the running udev processes are killed
to avoid unexepected behavior, we do this just before switching root,
once we do, a new udev process will be spawned from init and will take care
of whatever work was still missing

[YOCTO #9520]

(From OE-Core rev: e88d9e56952414e6214804f9b450c7106d04318d)

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/meta/recipes-core/initrdscripts/files/init-live.sh b/meta/recipes-core/initrdscripts/files/init-live.sh
index 09fb479915..441b41c9d6 100644
--- a/meta/recipes-core/initrdscripts/files/init-live.sh
+++ b/meta/recipes-core/initrdscripts/files/init-live.sh
@@ -80,7 +80,9 @@ read_args() {
 boot_live_root() {
     # Watches the udev event queue, and exits if all current events are handled
     udevadm settle --timeout=3 --quiet
-    killall "${_UDEV_DAEMON##*/}" 2>/dev/null
+    # Kills the current udev running processes, which survived after
+    # device node creation events were handled, to avoid unexpected behavior
+    killall -9 "${_UDEV_DAEMON##*/}" 2>/dev/null
 
     # Allow for identification of the real root even after boot
     mkdir -p  ${ROOT_MOUNT}/media/realroot