This is a note to let you know that I've just added the patch titled serial: 8250_em: Fix UART port type to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: serial-8250_em-fix-uart-port-type.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 32e293be736b853f168cd065d9cbc1b0c69f545d Mon Sep 17 00:00:00 2001 From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> Date: Mon, 27 Feb 2023 11:41:46 +0000 Subject: serial: 8250_em: Fix UART port type From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> commit 32e293be736b853f168cd065d9cbc1b0c69f545d upstream. As per HW manual for EMEV2 "R19UH0040EJ0400 Rev.4.00", the UART IP found on EMMA mobile SoC is Register-compatible with the general-purpose 16750 UART chip. Fix UART port type as 16750 and enable 64-bytes fifo support. Fixes: 22886ee96895 ("serial8250-em: Emma Mobile UART driver V2") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230227114152.22265-2-biju.das.jz@xxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/tty/serial/8250/8250_em.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/tty/serial/8250/8250_em.c +++ b/drivers/tty/serial/8250/8250_em.c @@ -106,8 +106,8 @@ static int serial8250_em_probe(struct pl memset(&up, 0, sizeof(up)); up.port.mapbase = regs->start; up.port.irq = irq; - up.port.type = PORT_UNKNOWN; - up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP; + up.port.type = PORT_16750; + up.port.flags = UPF_FIXED_PORT | UPF_IOREMAP | UPF_FIXED_TYPE; up.port.dev = &pdev->dev; up.port.private_data = priv; Patches currently in stable-queue which might be from biju.das.jz@xxxxxxxxxxxxxx are queue-6.1/serial-8250_em-fix-uart-port-type.patch