Re: [patch 2.6.13-git] 8250 tweaks

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Tue, Jul 12, 2005 at 03:25:12AM -0700, david-b@pacbell.net wrote:
> > Date: Tue, 12 Jul 2005 08:19:43 +0100
> > From: Russell King <rmk+lkml@arm.linux.org.uk>
> >
> > On Mon, Jul 11, 2005 at 07:22:04PM -0700, David Brownell wrote:
> > > and stop
> > > whining about certain non-errors (details in the patch comments).
> >
> > Please explain what the whining is (details were missing from the
> > patch comments).
> 
> The kernel "recently" started issuing the second and third messages
> after initializing the serial port on for example an OSK board:
> 
>     ttyS0 at MMIO 0xfffb0000 (irq = 46) is a ST16654
>     serial8250 serial8250.0: unable to register port at index 1 (IO0 MEM0 IRQ47): -28
>     serial8250 serial8250.0: unable to register port at index 2 (IO0 MEM0 IRQ15): -28

Thanks, that's exactly what I wanted to know.

-28 is -ENOSPC which means that you've run out of available serial devices
to register these others.

If you wish to have three ports in an plat_serial8250_port array, you'll
need to ensure that CONFIG_SERIAL_8250_NR_UARTS is set to at least 3.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core