Merge tag 'usb-serial-5.11-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git...

Merge tag 'usb-serial-5.11-rc1' of https://git./linux/kernel/git/johan/usb-serial into usb-next

Johan writes:

USB-serial updates for 5.11-rc1

Here are the USB-serial updates for 5.11-rc1, including:

 - keyspan_pda write-implementation fixes
 - digi_acceleport write-wakeup fix
 - mos7720 parport-restore fix
 - mos7720 parport-tasklet removal
 - cp210x termios-handling cleanups
 - option device-flag fix
 - ftdi_sio GPIO CBUS-configuration improvements
 - removal of in_interrupt() uses

Included are also various clean ups.

All have been in linux-next with no reported issues.

* tag 'usb-serial-5.11-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial: (30 commits)
  USB: serial: ftdi_sio: log the CBUS GPIO validity
  USB: serial: ftdi_sio: drop GPIO line checking dead code
  USB: serial: ftdi_sio: report the valid GPIO lines to gpiolib
  USB: serial: option: add interface-number sanity check to flag handling
  USB: serial: cp210x: clean up dtr_rts()
  USB: serial: cp210x: refactor flow-control handling
  USB: serial: cp210x: drop flow-control debugging
  USB: serial: cp210x: set terminal settings on open
  USB: serial: cp210x: clean up line-control handling
  USB: serial: cp210x: return early on unchanged termios
  USB: serial: mos7720: defer state restore to a workqueue
  USB: serial: mos7720: fix parallel-port state restore
  USB: serial: remove write wait queue
  USB: serial: digi_acceleport: fix write-wakeup deadlocks
  USB: serial: keyspan_pda: drop redundant usb-serial pointer
  USB: serial: keyspan_pda: use BIT() macro
  USB: serial: keyspan_pda: clean up comments and whitespace
  USB: serial: keyspan_pda: clean up xircom/entrega support
  USB: serial: keyspan_pda: add write-fifo support
  USB: serial: keyspan_pda: increase transmitter threshold
  ...