On Tue, 20 Feb 2007 14:19:51 +1100 (EST) David Gibson <[EMAIL PROTECTED]> wrote:
> At present, the serial core always allows setserial in userspace to > change the port address, irq and base clock of any serial port. That > makes sense for legacy ISA ports, but not for (say) embedded ns16550 > compatible serial ports at peculiar addresses. In these cases, the > kernel code configuring the ports must know exactly where they are, > and their clocking arrangements (which can be unusual on embedded > boards). It doesn't make sense for userspace to change these > settings. > > Therefore, this patch defines a UPF_FIXED_PORT flag for the uart_port > structure. If this flag is set when the serial port is configured, > any attempts to alter the port's type, io address, irq or base clock > with setserial are ignored. > > In addition this patch uses the new flag for on-chip serial ports > probed in arch/powerpc/kernel/legacy_serial.c, and for other > hard-wired serial ports probed by drivers/serial/of_serial.c. > > Signed-off-by: David Gibson <[EMAIL PROTECTED]> > Acked-by: Alan Cox <[EMAIL PROTECTED]> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
