@@ -762,13 +762,9 @@ static void cdns_uart_set_termios(struct uart_port *port,
*/
static int cdns_uart_startup(struct uart_port *port)
{
+ int ret;
unsigned long flags;
- unsigned int retval = 0, status = 0;
-
- retval = request_irq(port->irq, cdns_uart_isr, 0, CDNS_UART_NAME,
- (void *)port);
- if (retval)
- return retval;
+ unsigned int status = 0;
spin_lock_irqsave(&port->lock, flags);
@@ -814,15 +810,22 @@ static int cdns_uart_startup(struct uart_port *port)
writel(readl(port->membase + CDNS_UART_ISR_OFFSET),
port->membase + CDNS_UART_ISR_OFFSET);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ ret = request_irq(port->irq, cdns_uart_isr, 0, CDNS_UART_NAME, port);
+ if (ret) {
+ dev_err(port->dev, "request_irq '%d' failed with %d\n",
+ port->irq, ret);
+ return ret;
+ }
+
/* Set the Interrupt Registers with desired interrupts */
writel(CDNS_UART_IXR_TXEMPTY | CDNS_UART_IXR_PARITY |
CDNS_UART_IXR_FRAMING | CDNS_UART_IXR_OVERRUN |
CDNS_UART_IXR_RXTRIG | CDNS_UART_IXR_TOUT,
port->membase + CDNS_UART_IER_OFFSET);
- spin_unlock_irqrestore(&port->lock, flags);
-
- return retval;
+ return 0;
}
/**
Request_irq() should be _after_ h/w programming, otherwise an interrupt could be triggered and in-progress before the h/w has been setup. Reported-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> --- drivers/tty/serial/xilinx_uartps.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-)