If cleanup() is called early on, as happens when the device isn't
writeable, then none of the mount point variables are set; thus the
script was calling grep with only one argument and appeared to hang
since it was waiting for input on stdin.
(From OE-Core master rev: cf4a18eec2a65d840352d1a2862242d116e8a409)
(From OE-Core rev: f8b8fbeee3f5c51f6b3e39200f935156be3936f3)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2dd79784e8