[GIT PULL] USB serial updates for 7.3-rc1

The following changes since commit a13c140cc289c0b7b3770bce5b3ad42ab35074aa:

  Linux 7.2-rc3 (2026-07-12 14:16:39 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git tags/usb-serial-7.3-rc1

for you to fetch changes up to 15734de99517b0c81a1a5a3bccaff4593ef8d953:

  USB: serial: pl2303: add support for PL256X multi-port devices (2026-08-03 10:48:44 +0200)

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USB serial updates for 7.3-rc1

Here are the USB serial updates for 7.3-rc1, including:

 - fix digi_acceleport port registration order
 - stop digi_acceleport I/O when ports are closed
 - fix digi_acceleport OOB port dev_printk()
 - fix metro-usb unthrottle race
 - fix option slab OOB read with malicious devices
 - add support for a new class of Prolific PL256X devices

Included are also various clean ups.

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

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Charles Yeh (1):
      USB: serial: pl2303: add support for PL256X multi-port devices

Jiale Yao (1):
      USB: serial: option: fix slab OOB read in interrupt URB callback

Johan Hovold (17):
      USB: serial: digi_acceleport: do not log stopping of urbs as errors
      USB: serial: digi_acceleport: fix port registration order
      USB: serial: digi_acceleport: drop unused wait queue
      USB: serial: digi_acceleport: always stop write urb on close
      USB: serial: digi_acceleport: add oob port helper
      USB: serial: digi_acceleport: clean up declarations and whitespace
      USB: serial: digi_acceleport: drop redundant driver data sanity checks
      USB: serial: digi_acceleport: stop OOB I/O when not in use
      USB: serial: digi_acceleport: drop unused in-buf define
      USB: serial: digi_acceleport: clean up xfer buf length expression
      USB: serial: digi_acceleport: clean up write completion
      USB: serial: digi_acceleport: clean up inb command submission
      USB: serial: digi_acceleport: fix oob port dev_printk()
      USB: serial: metro-usb: replace unnecessary atomic allocation
      USB: serial: metro-usb: fix unthrottle race
      USB: serial: metro-usb: drop redundant initialisations
      USB: serial: keyspan_pda: drop unused driver data usb-serial pointer

 drivers/usb/serial/digi_acceleport.c | 325 ++++++++++++++---------------------
 drivers/usb/serial/keyspan_pda.c     |   1 -
 drivers/usb/serial/metro-usb.c       |  31 ++--
 drivers/usb/serial/option.c          |  20 ++-
 drivers/usb/serial/pl2303.c          | 108 +++++++++++-
 drivers/usb/serial/pl2303.h          |   2 +-
 6 files changed, 269 insertions(+), 218 deletions(-)