target/linux/pxa/patches-2.6.21/023-bugfix-serial-interrupt.patch

   1 --- a/drivers/serial/pxa.c
   2 +++ b/drivers/serial/pxa.c
   3 @@ -235,15 +235,19 @@ static inline irqreturn_t serial_pxa_irq
   4         struct uart_pxa_port *up = dev_id;
   5         unsigned int iir, lsr;
   6
   7 +       serial_out(up, UART_MCR, serial_in(up, UART_MCR) & ~UART_MCR_RTS); // Clear RTS
   8         iir = serial_in(up, UART_IIR);
   9         if (iir & UART_IIR_NO_INT)
  10 -               return IRQ_NONE;
  11 +       {
  12 +               //printk(KERN_WARNING "serial_pxa_irq: odd -- interrupt triggered, but no interrupt in IIR: %08x\n",iir);
  13 +       }
  14         lsr = serial_in(up, UART_LSR);
  15         if (lsr & UART_LSR_DR)
  16                 receive_chars(up, &lsr);
  17         check_modem_status(up);
  18         if (lsr & UART_LSR_THRE)
  19                 transmit_chars(up);
  20 +       serial_out(up, UART_MCR, serial_in(up, UART_MCR) | UART_MCR_RTS); // Assert RTS
  21         return IRQ_HANDLED;
  22  }
  23