[PATCH v4 08/11] tty: add pruss SUART driver

[Subhasish Ghosh]

>> I then modified this function to as follows and the error is not observed
>> anymore.
>
> That looks like you are somehow calling uart_carrier_raised somewhere
> with interrupts disabled ?
>
I am not calling this function in my driver atall, this is getting called by 
tty_port.c

int tty_port_block_til_ready(struct tty_port *port,
                                struct tty_struct *tty, struct file *filp)
{
 /* Probe the carrier. For devices with no carrier detect this
                   will always return true */
                cd = tty_port_carrier_raised(port);
                if (!(port->flags & ASYNC_CLOSING) &&
                                (do_clocal || cd))
                        break;
                if (signal_pending(current)) {
                        retval = -ERESTARTSYS;
                        break;
                }