diff options
| author |   Shaohua Li <shaohua.li@intel.com> | 2007-11-17 01:05:28 -0500 |
|---|---|---|
| committer |   Len Brown <len.brown@intel.com> | 2007-11-20 01:16:29 -0500 |
| commit | 61fd47e0c84764f49b4e52bfd8170fac52636f00 (patch) | |
| tree | c94c7b8c43dee4bb123900f49ef781607ee0d6fb /drivers/pnp/pnpacpi/rsparser.c | |
| parent | Revert "Fix very high interrupt rate for IRQ8 (rtc) unless pnpacpi=off" (diff) | |
| download | linux-dev-61fd47e0c84764f49b4e52bfd8170fac52636f00.tar.xz linux-dev-61fd47e0c84764f49b4e52bfd8170fac52636f00.zip | |
ACPI: fix two IRQ8 issues in IOAPIC mode
Use mp_irqs[] to get PNP device's interrupt polarity and trigger.
There are two reasons to do this:
1. BIOS bug for PNP interrupt
2. BIOS explictly does override
mp_irqs[] should cover all the cases.
http://bugzilla.kernel.org/show_bug.cgi?id=5243
http://bugzilla.kernel.org/show_bug.cgi?id=7679
http://bugzilla.kernel.org/show_bug.cgi?id=9153
[lenb: fixed !IOAPIC and 64-bit !SMP builds]
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/pnp/pnpacpi/rsparser.c')
| -rw-r--r-- | drivers/pnp/pnpacpi/rsparser.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c index 0e3b8d0ff06b..11adab13f2b7 100644 --- a/drivers/pnp/pnpacpi/rsparser.c +++ b/drivers/pnp/pnpacpi/rsparser.c @@ -75,6 +75,7 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res, { int i = 0; int irq; + int p, t; if (!valid_IRQ(gsi)) return; @@ -85,6 +86,23 @@ static void pnpacpi_parse_allocated_irqresource(struct pnp_resource_table *res, if (i >= PNP_MAX_IRQ) return; + /* + * in IO-APIC mode, use overrided attribute. Two reasons: + * 1. BIOS bug in DSDT + * 2. BIOS uses IO-APIC mode Interrupt Source Override + */ + if (!acpi_get_override_irq(gsi, &t, &p)) { + t = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; + p = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; + + if (triggering != t || polarity != p) { + pnp_warn("IRQ %d override to %s, %s", + gsi, t ? "edge":"level", p ? "low":"high"); + triggering = t; + polarity = p; + } + } + res->irq_resource[i].flags = IORESOURCE_IRQ; // Also clears _UNSET flag res->irq_resource[i].flags |= irq_flags(triggering, polarity); irq = acpi_register_gsi(gsi, triggering, polarity); |