[PATCH] serial: imx: Fix buggy transmissions when baudrate mismatches

[Fabio Estevam]

Hi Sascha,

On Thu, May 15, 2014 at 6:21 PM, Sascha Hauer <s.hauer at pengutronix.de> wrote:

>> --- a/drivers/serial/serial_imx.c
>> +++ b/drivers/serial/serial_imx.c
>> @@ -258,7 +258,8 @@ static int imx_serial_getc(struct console_device *cdev)
>>         while (readl(priv->regs + priv->devtype->uts) & UTS_RXEMPTY);
>>
>>         ch = readl(priv->regs + URXD0);
>> -
>> +       if (ch >= 0x80)
>> +               ch = '?';
>
> This is not part of the fix, right?

Correct, this is not part of the fix.

This code is just to help reproducing the issue in console, without
the need of hooking an oscilloscope to the UART pins or inspecting
directly the UART TX registers.