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Date: Wed, 21 Mar 2007 10:35:38 -0600 From: Bjorn Helgaas <bjorn.helgaas@...com> To: Keith Owens <kaos@....com.au> Cc: linux-kernel@...r.kernel.org, len.brown@...el.com, Andrew Morton <akpm@...ux-foundation.org>, Russell King <rmk+lkml@....linux.org.uk> Subject: Re: PNPACPI probes serial twice, messes up serial console On Tuesday 20 March 2007 08:32, Bjorn Helgaas wrote: > On Tuesday 20 March 2007 00:46, Keith Owens wrote: > > Booting with 'console=tty console=ttyS0,9600'. The serial console on > > ttyS0 (0x3f8, irq 4) is probed twice, once from serial8250_init() and > > again from serial_pnp_probe(). > > I played with this last summer, but was too timid to finish it > and post it. My plan was to remove the legacy SERIAL_PORT_DFNS, > make platform devices for them, and only register the platform > devices in the absence of PNP. > > My motivation at the time was to prevent 8250 from claiming IRDA > devices that happened to live at legacy UART addresses. I also > wanted to make IRDA (smsc-ircc2 in my case) smart enough to use > PNP to locate its devices, since 8250 would no longer claim them. > > Here's the dusty patch (against 2.6.18-rc1-mm2). If it seems > like a reasonable thing to do, I can update it, polish it up, > add a changelog, and post it. Keith, does this patch help? Russell didn't complain about it, so if it fixes your problem, maybe we could put it in -mm and see if it breaks anything else. Bjorn - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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