tree 0c7ddf79ac0ecf03dfd6ba25f8549dbf64fac276
parent bf16200689118d19de1b8d2a3c314fc21f5dc7bb
author Oliver Neukum <oneukum@suse.com> 1459773053 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1460573587 -0700

cdc-acm: fix crash if flushed with nothing buffered

Under some circumstances acm_tty_flush_chars() is called
with no buffer to flush. We simply need to do nothing.

Signed-off-by: Oliver Neukum <ONeukum@suse.com>
Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>