Hi Linux hackers,
I am trying to bootup my Mikrotik RB532 board with the latest
kernel, but my serial console is disabled after boot:
..
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
serial8250: ttyS0 at MMIO 0x0 (irq = 104, base_baud = 12499875) is a
16550A
console [ttyS0] enabled
console [ttyS0] disabled
I used git bisect to find the problematic commit:
commit 5f5c9ae56c38942623f69c3e6dc6ec78e4da2076
Author: Geert Uytterhoeven <geert+rene...@linux-m68k.org>
Date: Fri Feb 28 14:21:32 2014 +0100
serial_core: Unregister console in uart_remove_one_port()
If the serial port being removed is used as a console, it must
also be
unregistered from the console subsystem using
unregister_console().
uart_ops.release_port() will release resources (e.g. iounmap()
the serial
port registers), causing a crash on subsequent kernel output if
the console
is still registered.
Signed-off-by: Geert Uytterhoeven <geert+rene...@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
After reverting the change, everything is fine.
I can provide a .config and dmesg if needed.
Thanks in advance
Waldemar
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