USB: g_serial: don't set low_latency flag

commit 44a0c0190b500ee6bcfc0976fe540f65dee2cd67 upstream.

No longer set low_latency flag as it causes this warning backtrace:

  WARNING: at kernel/mutex.c:207 __mutex_lock_slowpath+0x6c/0x288()

Fix associated locking and wakeups.

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Cc: Maulik Mankad <x0082077@ti.com>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB: g_serial: fix tty cleanup on unload

commit b23097b793081358a6d943263c91bae4c955c4e3 upstream.

Call put_tty_driver() in cleanup function, to fix Oops when trying to open
gadget serial char device after module unload.

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB: option: add support for 1da5:4518

commit 646d90e2b925578abef5c45853e0b166b6a450bf upstream.

Signed-off-by: Omer Sezgin Ugurlu <omer.ugurlu@a-kent.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
USB: Add PID for Sierra 250U to drivers/usb/serial/sierra.c

commit 9d72c81d657340e54a260a3b621f4a9f5b33829c upstream.

Add VID/PID for Sierra Wireless 250U USB dongle to sierra.c
Allows use of 3G radio only

Signed-off-by: August Huber <gus@pbx.org>
Cc: Elina Pasheva <epasheva@sierrawireless.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>