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smsc-ircc2: skip preconfiguration for PNP devices 

If we rely on the device resources from PNPBIOS, we also have to rely on
the BIOS to configure any bridges on the way to the device.

Using the PNPBIOS resources but changing the configuration of a bridge
behind the back of the firmware is likely to make things inconsistent.

This patch addresses part of the 2.6.22 regression:
    "no irda0 interface (2.6.21 was OK), smsc does not find chip"
It fixes smsc-ircc2 PNP device detection on HP nx5000 laptops.
Other laptops, including HP nc6000, HP nc8000, HP nw8000, and Toshiba
Portege 4000, still need PNP quirks to make this work.

With "smsc-ircc2.nopnp", we do the legacy device probe, including manual
bridge preconfiguration, as before.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Samuel Ortiz <samuel@sortiz.org>
Acked-by: "Linus Walleij (LD/EAB)" <linus.walleij@ericsson.com>
Cc: Andrey Borzenkov <arvidjaar@mail.ru>
Cc: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Adam Belay <ambx1@neo.rr.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bjorn Helgaas 2007-06-27 14:09:50 -07:00 committed by Linus Torvalds
parent 80581c43d0
commit 7c31d2f59c
1 changed files with 7 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/net/irda/smsc-ircc2.c
View File

@ -416,6 +416,13 @@ static int __init smsc_ircc_legacy_probe(void)
{
int ret = 0;
#ifdef CONFIG_PCI
if (smsc_ircc_preconfigure_subsystems(ircc_cfg, ircc_fir, ircc_sir, ircc_dma, ircc_irq) < 0) {
/* Ignore errors from preconfiguration */
IRDA_ERROR("%s, Preconfiguration failed !\n", driver_name);
}
#endif
if (ircc_fir > 0 && ircc_sir > 0) {
IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
@ -459,13 +466,6 @@ static int __init smsc_ircc_init(void)
return ret;
}
#ifdef CONFIG_PCI
if (smsc_ircc_preconfigure_subsystems(ircc_cfg, ircc_fir, ircc_sir, ircc_dma, ircc_irq) < 0) {
/* Ignore errors from preconfiguration */
IRDA_ERROR("%s, Preconfiguration failed !\n", driver_name);
}
#endif
dev_count = 0;
if (smsc_nopnp || !pnp_platform_devices ||