On Thu, 27 Sep 2007, bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=5243
------- Comment #14 from yakui.zhao@xxxxxxxxx 2007-09-27 18:32 -------
(In reply to comment #13)
Created an attachment (id=12951)
--> (http://bugzilla.kernel.org/attachment.cgi?id=12951&action=view) [details]
Working workaround for this PNP BIOS bug
Now it seems that the patch can solve the problem. Will you please send the
patch to the acpi maillist?
Attached.
Best regards,
Krzysztof Olędzki
From: Krzysztof Oledzki <olel@xxxxxx>
Workaround for broken systems with BIOS that makes RTC interrupt level
triggered and/or active low.
See http://bugzilla.kernel.org/show_bug.cgi?id=5243
Based on the patch from Shaohua Li <shaohua.li@xxxxxxxxx>
Signed-off-by: Krzysztof Piotr Oledzki <ole@xxxxxx>
Cc: "Li, Shaohua" <shaohua.li@xxxxxxxxx>
Cc: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Adam Belay <ambx1@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN drivers/pnp/pnpacpi/rsparser.c~fix-very-high-interrupt-rate-for-irq8-rtc-unless-pnpacpi=off drivers/pnp/pnpacpi/rsparser.c
--- a/drivers/pnp/pnpacpi/rsparser.c~fix-very-high-interrupt-rate-for-irq8-rtc-unless-pnpacpi=off
+++ a/drivers/pnp/pnpacpi/rsparser.c
@@ -85,6 +85,16 @@ static void pnpacpi_parse_allocated_irqr
if (i >= PNP_MAX_IRQ)
return;
+#ifdef CONFIG_X86
+ if (gsi < 16 && (triggering != ACPI_EDGE_SENSITIVE ||
+ polarity != ACPI_ACTIVE_HIGH)) {
+ pnp_warn("BIOS BUG: legacy PNP IRQ %d should be edge trigger, "
+ "active high", gsi);
+ triggering = ACPI_EDGE_SENSITIVE;
+ polarity = ACPI_ACTIVE_HIGH;
+ }
+#endif
+
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);
_
