serial: define FIXED_PORT flag for serial_core
[linux-2.6.git] / drivers / serial / serial_core.c
index a677133ab2d4fbf0d0625cb29bd6e86f328eda47..f409be37b62f43e1970e01ab401734793cc3dd60 100644 (file)
@@ -672,19 +672,21 @@ static int uart_set_info(struct uart_state *state,
         */
        mutex_lock(&state->mutex);
 
-       change_irq  = new_serial.irq != port->irq;
+       change_irq  = !(port->flags & UPF_FIXED_PORT)
+               && new_serial.irq != port->irq;
 
        /*
         * Since changing the 'type' of the port changes its resource
         * allocations, we should treat type changes the same as
         * IO port changes.
         */
-       change_port = new_port != port->iobase ||
-                     (unsigned long)new_serial.iomem_base != port->mapbase ||
-                     new_serial.hub6 != port->hub6 ||
-                     new_serial.io_type != port->iotype ||
-                     new_serial.iomem_reg_shift != port->regshift ||
-                     new_serial.type != port->type;
+       change_port = !(port->flags & UPF_FIXED_PORT)
+               && (new_port != port->iobase ||
+                   (unsigned long)new_serial.iomem_base != port->mapbase ||
+                   new_serial.hub6 != port->hub6 ||
+                   new_serial.io_type != port->iotype ||
+                   new_serial.iomem_reg_shift != port->regshift ||
+                   new_serial.type != port->type);
 
        old_flags = port->flags;
        new_flags = new_serial.flags;
@@ -796,8 +798,10 @@ static int uart_set_info(struct uart_state *state,
                }
        }
 
-       port->irq              = new_serial.irq;
-       port->uartclk          = new_serial.baud_base * 16;
+       if (change_irq)
+               port->irq      = new_serial.irq;
+       if (!(port->flags & UPF_FIXED_PORT))
+               port->uartclk  = new_serial.baud_base * 16;
        port->flags            = (port->flags & ~UPF_CHANGE_MASK) |
                                 (new_flags & UPF_CHANGE_MASK);
        port->custom_divisor   = new_serial.custom_divisor;