libertas: Communicate USB transfer errors
libertas: Communicate USB transfer errors

The return code was being overwritten with -1.
Useful for debugging.

Signed-off-by: Paul Fox <f4dbc3a2a3ed675c194eed07766c8df711ef8b75@laptop.org>
Signed-off-by: Daniel Drake <83b0c3d63e8a11eb6e40077030b59e95bfe31ffa@laptop.org>
Acked-by: Dan Williams <aeade43d0f8ae14e7c44fa81fe17c1635ae376fe@redhat.com>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas