3cd882744d
$BOOTDEV_MAJOR may be empty for many of the uevents parsed in this function. This condition thus tends to fail benignly (we just skip to the next device), but it can really clutter the stage2 sysupgrade stderr, since it looks like the "=" operand doesn't have an appropriate left-hand argument. Signed-off-by: Brian Norris <computersforpeace@gmail.com>