• Jonas Gorski's avatar
    MIPS: AR7: ensure the port type's FCR value is used · 0a5191ef
    Jonas Gorski authored
    Since commit aef9a7bd ("serial/uart/8250: Add tunable RX interrupt
    trigger I/F of FIFO buffers"), the port's default FCR value isn't used
    in serial8250_do_set_termios anymore, but copied over once in
    serial8250_config_port and then modified as needed.
    
    Unfortunately, serial8250_config_port will never be called if the port
    is shared between kernel and userspace, and the port's flag doesn't have
    UPF_BOOT_AUTOCONF, which would trigger a serial8250_config_port as well.
    
    This causes garbled output from userspace:
    
    [    5.220000] random: procd urandom read with 49 bits of entropy available
    ers
       [kee
    
    Fix this by forcing it to be configured on boot, resulting in the
    expected output:
    
    [    5.250000] random: procd urandom read with 50 bits of entropy available
    Press the [f] key and hit [enter] to enter failsafe mode
    Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
    
    Fixes: aef9a7bd ("serial/uart/8250: Add tunable RX interrupt trigger I/F of FIFO buffers")
    Signed-off-by: 's avatarJonas Gorski <jonas.gorski@gmail.com>
    Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Cc: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
    Cc: Florian Fainelli <f.fainelli@gmail.com>
    Cc: Nicolas Schichan <nschichan@freebox.fr>
    Cc: linux-mips@linux-mips.org
    Cc: linux-serial@vger.kernel.org
    Patchwork: https://patchwork.linux-mips.org/patch/17544/Signed-off-by: 's avatarRalf Baechle <ralf@linux-mips.org>
    0a5191ef
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