On Wednesday 29 August 2007 09:28:01 am Michal Piotrowski wrote: > Subject : 8250 claims non existing device blocking IO port > References : http://lkml.org/lkml/2007/8/18/20 > Last known good : ? > Submitter : Andrey Borzenkov <arvidjaar@xxxxxxx> > Caused-By : ? > Handled-By : Bjorn Helgaas <bjorn.helgaas@xxxxxx> > Patch : http://lkml.org/lkml/2007/8/21/291 > Status : patch was suggested The following patch fixes this regression (confirmed by Andrey). Please queue it for 2.6.23. I'll come back later for another try at sorting this all out. PNP: remove SMCf010 quirk If the quirk enables the SIR part of the SMCf010 device, the 8250 driver may claim it as a legacy ttyS device, which makes the legacy probe in the smsc-ircc2 driver fail. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx> Index: w/drivers/pnp/quirks.c =================================================================== --- w.orig/drivers/pnp/quirks.c 2007-08-29 10:23:52.000000000 -0600 +++ w/drivers/pnp/quirks.c 2007-08-29 10:24:01.000000000 -0600 @@ -107,108 +107,6 @@ "pnp: SB audio device quirk - increasing port range\n"); } -static int quirk_smc_fir_enabled(struct pnp_dev *dev) -{ - unsigned long firbase; - u8 bank, high, low, chip; - - if (!pnp_port_valid(dev, 1)) - return 0; - - firbase = pnp_port_start(dev, 1); - - /* Select register bank 3 */ - bank = inb(firbase + 7); - bank &= 0xf0; - bank |= 3; - outb(bank, firbase + 7); - - high = inb(firbase + 0); - low = inb(firbase + 1); - chip = inb(firbase + 2); - - /* This corresponds to the check in smsc_ircc_present() */ - if (high == 0x10 && low == 0xb8 && (chip == 0xf1 || chip == 0xf2)) - return 1; - - return 0; -} - -static void quirk_smc_enable(struct pnp_dev *dev) -{ - struct resource fir, sir, irq; - - pnp_activate_dev(dev); - if (quirk_smc_fir_enabled(dev)) - return; - - /* - * Sometimes the BIOS claims the device is enabled, but it reports - * the wrong FIR resources or doesn't properly configure ISA or LPC - * bridges on the way to the device. - * - * HP nc6000 and nc8000/nw8000 laptops have known problems like - * this. Fortunately, they do fix things up if we auto-configure - * the device using its _PRS and _SRS methods. - */ - dev_err(&dev->dev, "%s not responding at SIR 0x%lx, FIR 0x%lx; " - "auto-configuring\n", dev->id->id, - (unsigned long)pnp_port_start(dev, 0), - (unsigned long)pnp_port_start(dev, 1)); - - pnp_disable_dev(dev); - pnp_init_resource_table(&dev->res); - pnp_auto_config_dev(dev); - pnp_activate_dev(dev); - if (quirk_smc_fir_enabled(dev)) { - dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n", - (unsigned long)pnp_port_start(dev, 0), - (unsigned long)pnp_port_start(dev, 1)); - return; - } - - /* - * The Toshiba Portege 4000 _CRS reports the FIR region first, - * followed by the SIR region. The BIOS will configure the bridge, - * but only if we call _SRS with SIR first, then FIR. It also - * reports the IRQ as active high, when it is really active low. - */ - dev_err(&dev->dev, "not responding at SIR 0x%lx, FIR 0x%lx; " - "swapping SIR/FIR and reconfiguring\n", - (unsigned long)pnp_port_start(dev, 0), - (unsigned long)pnp_port_start(dev, 1)); - - /* - * Clear IORESOURCE_AUTO so pnp_activate_dev() doesn't reassign - * these resources any more. - */ - fir = dev->res.port_resource[0]; - sir = dev->res.port_resource[1]; - fir.flags &= ~IORESOURCE_AUTO; - sir.flags &= ~IORESOURCE_AUTO; - - irq = dev->res.irq_resource[0]; - irq.flags &= ~IORESOURCE_AUTO; - irq.flags &= ~IORESOURCE_BITS; - irq.flags |= IORESOURCE_IRQ_LOWEDGE; - - pnp_disable_dev(dev); - dev->res.port_resource[0] = sir; - dev->res.port_resource[1] = fir; - dev->res.irq_resource[0] = irq; - pnp_activate_dev(dev); - - if (quirk_smc_fir_enabled(dev)) { - dev_err(&dev->dev, "responds at SIR 0x%lx, FIR 0x%lx\n", - (unsigned long)pnp_port_start(dev, 0), - (unsigned long)pnp_port_start(dev, 1)); - return; - } - - dev_err(&dev->dev, "giving up; try \"smsc-ircc2.nopnp\" and " - "email bjorn.helgaas@xxxxxx\n"); -} - /* * PnP Quirks * Cards or devices that need some tweaking due to incomplete resource info @@ -229,7 +127,6 @@ {"CTL0043", quirk_sb16audio_resources}, {"CTL0044", quirk_sb16audio_resources}, {"CTL0045", quirk_sb16audio_resources}, - {"SMCf010", quirk_smc_enable}, {""} }; - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
