[PARISC] I/O-Space must be ioremap_nocache()'d

Addresses in F-space must be accessed uncached on most parisc machines.

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>

2 files changed, 10 insertions, 9 deletions

diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c
index 8b4947933d9b..913c71cc0569 100644
--- a/drivers/serial/8250_gsc.c
+++ b/drivers/serial/8250_gsc.c
@@ -52,13 +52,14 @@ serial_init_chip(struct parisc_device *dev)
                 address += 0x800;
         }
 
-        memset(&port, 0, sizeof(struct uart_port));
-        port.mapbase = address;
-        port.irq = dev->irq;
-        port.iotype = UPIO_MEM;
-        port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
-        port.uartclk = LASI_BASE_BAUD * 16;
-        port.dev = &dev->dev;
+        memset(&port, 0, sizeof(port));
+        port.iotype     = UPIO_MEM;
+        port.uartclk    = LASI_BASE_BAUD * 16;
+        port.mapbase    = address;
+        port.membase    = ioremap_nocache(address, 16);
+        port.irq        = dev->irq;
+        port.flags      = UPF_BOOT_AUTOCONF;
+        port.dev        = &dev->dev;
 
         err = serial8250_register_port(&port);
         if (err < 0) {
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index 868eaf4a1a68..64c0e89124c9 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -51,7 +51,7 @@
 #define MUX_BREAK(status) ((status & 0xF000) == 0x2000)
 
 #define MUX_NR 256
-static unsigned int port_cnt = 0;
+static unsigned int port_cnt __read_mostly;
 static struct uart_port mux_ports[MUX_NR];
 
 static struct uart_driver mux_driver = {
@@ -461,7 +461,7 @@ static int __init mux_probe(struct parisc_device *dev)
                 port->iobase    = 0;
                 port->mapbase   = dev->hpa.start + MUX_OFFSET +
                                                 (i * MUX_LINE_OFFSET);
-                port->membase   = ioremap(port->mapbase, MUX_LINE_OFFSET);
+                port->membase   = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
                 port->iotype    = UPIO_MEM;
                 port->type      = PORT_MUX;
                 port->irq       = NO_IRQ;