TTY/Serial driver fixes for 7.0-rc5

The following changes since commit 1f318b96cc84d7c2ab792fcc0bfd42a7ca890681:

Linux 7.0-rc3 (2026-03-08 16:56:54 -0700)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tags/tty-7.0-rc5

for you to fetch changes up to 5eb608319bb56464674a71b4a66ea65c6c435d64:

vt: save/restore unicode screen buffer for alternate screen (2026-03-13 09:15:58 +0100)

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TTY/Serial fixes for 7.0-rc5

Here are some small tty/vt and serial driver fixes for 7.0-rc5. Included in here are:
- 8250 driver fixes for reported problems
- serial core lockup fix
- uartlite driver bugfix
- vt save/restore bugfix

All of these have been in linux-next for over a week with no reported problems.

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Ilpo Järvinen (7):
serial: 8250: Protect LCR write in shutdown
serial: 8250_dw: Avoid unnecessary LCR writes
serial: 8250: Add serial8250_handle_irq_locked()
serial: 8250_dw: Rework dw8250_handle_irq() locking and IIR handling
serial: 8250_dw: Rework IIR_NO_INT handling to stop interrupt storm
serial: 8250: Add late synchronize_irq() to shutdown to handle DW UART BUSY
serial: 8250_dw: Ensure BUSY is deasserted

Jiayuan Chen (1):
serial: core: fix infinite loop in handle_tx() for PORT_UNKNOWN

Maciej Andrzejewski ICEYE (1):
serial: uartlite: fix PM runtime usage count underflow on probe

Martin Roukala (né Peres) (1):

      serial: 8250_pci: add support for the AX99100

Nicolas Pitre (1):
vt: save/restore unicode screen buffer for alternate screen

Peng Zhang (1):
serial: 8250: always disable IRQ during THRE test

Raul E Rangel (1):
serial: 8250: Fix TX deadlock when using DMA

 drivers/tty/serial/8250/8250.h      |  25 +++
 drivers/tty/serial/8250/8250_dma.c  |  15 ++
 drivers/tty/serial/8250/8250_dw.c   | 304 ++++++++++++++++++++++++++++--------
 drivers/tty/serial/8250/8250_pci.c  |  17 ++
 drivers/tty/serial/8250/8250_port.c |  75 +++++----
 drivers/tty/serial/serial_core.c    |   5 +-
 drivers/tty/serial/uartlite.c       |   1 +
 drivers/tty/vt/vt.c                 |   8 +
 include/linux/console_struct.h      |   1 +
 include/linux/serial_8250.h         |   1 +
 10 files changed, 356 insertions(+), 96 deletions(-)