tree f88e890bbee89421271437761024130e0c831853
parent 7e94b1d9bffc18dca3b45554d9d118a3ffcc4d1b
author Alan Cox <alan@redhat.com> 1230903844 +0000
committer Linus Torvalds <torvalds@linux-foundation.org> 1230920377 -0800

tty: Fix close races in USB serial

USB serial has always had races where the tty port usage count can hit zero
during a receive event. The internal locking is a mutex so we can't use
that in the IRQ handlers.

With krefs we can tackle this differently but we still need to be careful.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>