serial: 8250_dw: Do not use readl/writel before checking port iotype

Direct call to readl()/writel() is checked against iotype
and in case of UPIO_MEM32BE we use ioread32be()/iowrite32be()
instead of them.

Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 92c4a9b..30810ac 100644 (file)
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -114,6 +114,8 @@ static void dw8250_check_lcr(struct uart_port *p, int value)
 #else
                if (p->iotype == UPIO_MEM32)
                        writel(value, offset);
+               else if (p->iotype == UPIO_MEM32BE)
+                       iowrite32be(value, offset);
                else
                        writeb(value, offset);
 #endif
@@ -327,14 +329,20 @@ static void dw8250_setup_port(struct uart_port *p)
         * If the Component Version Register returns zero, we know that
         * ADDITIONAL_FEATURES are not enabled. No need to go any further.
         */
-       reg = readl(p->membase + DW_UART_UCV);
+       if (p->iotype == UPIO_MEM32BE)
+               reg = ioread32be(p->membase + DW_UART_UCV);
+       else
+               reg = readl(p->membase + DW_UART_UCV);
        if (!reg)
                return;
 
        dev_dbg(p->dev, "Designware UART version %c.%c%c\n",
                (reg >> 24) & 0xff, (reg >> 16) & 0xff, (reg >> 8) & 0xff);
 
-       reg = readl(p->membase + DW_UART_CPR);
+       if (p->iotype == UPIO_MEM32BE)
+               reg = ioread32be(p->membase + DW_UART_CPR);
+       else
+               reg = readl(p->membase + DW_UART_CPR);
        if (!reg)
                return;