+ Bug with unmounting a non-existing mountpoint. The function returns ENODEV
+ but should be returning EINVAL.
+
+ Bug with reading -1 bytes of a file without an error (test is in test_yaffs_read_EINVAL).
+ It should return EINVAL.
+
+ Unmount2 forcing the unmount needs to break the handles so they return EBADF.
+
+ A read of -1 bytes tries to read 4 gig of data