Interrupt Storms on irq:11 with Tecra A4

[Yousef Raffah]

John Baldwin wrote:
> On Thursday 03 August 2006 03:47, Yousef Raffah wrote:
>   
>> John Baldwin wrote:
>>     
>>> On Wednesday 02 August 2006 01:56, Yousef Raffah wrote:
>>>   
>>> Well, these two appear to be your problem due to your BIOS having
>>> buggy ASL.  You can work around it, but you'll need to figure out
>>> the names of your link devices first.  'devinfo -v' with ACPI
>>> enabled can help with that.  For example, on my laptop:
>>>
>>> % devinfo -v | grep 'pci_link[67]'
>>>     pci_link6 pnpinfo _HID=PNP0C0F _UID=106 at handle=\_SB_.C002.C0F2
>>>     pci_link7 pnpinfo _HID=PNP0C0F _UID=107 at handle=\_SB_.C002.C0F3
>>>
>>>   
>>>       
>> Here is my devinfo
>>  devinfo -v | grep 'pci_link[67]'
>>     pci_link6 pnpinfo _HID=PNP0C0F _UID=7 at handle=\_SB_.PCI0.LPCB.LNKG
>>     pci_link7 pnpinfo _HID=PNP0C0F _UID=8 at handle=\_SB_.PCI0.LPCB.LNKH
>>
>> So I can see that pci_link6 is named LNKG and pci_link7 is LNKH
>>     
>
> Yep.
>
>   
>>> pci_link6 is called C0F2, and pci_link7 is called C0F3.  You'll use
>>> these names to override the IRQ for the link device by setting the
>>> following variables in the loader:
>>>
>>> hw.pci.link.C0F2.irq=11
>>> hw.pci.link.C0F3.irq=11
>>>
>>> (You'll have to replace C0F2 and C0F3 with the names for your link
>>> devices.  Probably LNKF and LNKG.)
>>>       
>> Based on that, I should have the following in my /boot/loader.conf?
>> hw.pci.link.LNKG.irq=11
>> hw.pci.link.LNKH.irq=11
>>     
>
> Yep.
>
>   
>> Let us try the loader file first and see if we need the patch after that.
>>     
>
> Ok.  I'm betting you will need the patch, but just want to make sure first.
>
>   
Looks like I do need the patch as the interrupt storm is still there.
Now how do I do that?
What should I do with this code? I mean where to put it? is there a
special way of
patch file < your_patch ?

Index: dev/acpica/acpi_pci_link.c
===================================================================
RCS file: /usr/cvs/src/sys/dev/acpica/acpi_pci_link.c,v
retrieving revision 1.53
diff -u -r1.53 acpi_pci_link.c
--- dev/acpica/acpi_pci_link.c	6 Jan 2006 16:14:32 -0000	1.53
+++ dev/acpica/acpi_pci_link.c	2 Aug 2006 14:27:09 -0000
@@ -941,18 +941,16 @@
 	KASSERT(!PCI_INTERRUPT_VALID(link->l_irq),
 	    ("%s: link already has an IRQ", __func__));
 
-	/* Check for a tunable override and use it if it is valid. */
+	/* Check for a tunable override. */
 	if (ACPI_SUCCESS(acpi_short_name(acpi_get_handle(dev), link_name,
 	    sizeof(link_name)))) {
 		snprintf(tunable_buffer, sizeof(tunable_buffer),
 		    "hw.pci.link.%s.%d.irq", link_name, link->l_res_index);
-		if (getenv_int(tunable_buffer, &i) &&
-		    PCI_INTERRUPT_VALID(i) && link_valid_irq(link, i))
+		if (getenv_int(tunable_buffer, &i) && PCI_INTERRUPT_VALID(i))
 			return (i);
 		snprintf(tunable_buffer, sizeof(tunable_buffer),
 		    "hw.pci.link.%s.irq", link_name);
-		if (getenv_int(tunable_buffer, &i) &&
-		    PCI_INTERRUPT_VALID(i) && link_valid_irq(link, i))
+		if (getenv_int(tunable_buffer, &i) && PCI_INTERRUPT_VALID(i))
 			return (i);
 	}

 




-- 

Sincerely,

Yousef Adnan Raffah
Security Officer
The Savola Group

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