mkefidisk.sh: fix hanging on non-writeable device

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.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index 74cf40d551cfae7f208eb7882bf93a481ea1fe09..d6bc965137f507b4d45b4456520642c89416db73 100755 (executable)
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -136,6 +136,9 @@ unmount_device() {
 }
 
 unmount() {
+       if [ "$1" = "" ] ; then
+               return 0
+       fi
        grep -q $1 /proc/mounts
        if [ $? -eq 0 ]; then
                debug "Unmounting $1"