USB handoff, irq 193: nobody cared!

[Michael Madore]

Hi,

I'm getting the following errors in my kernel log with 2.6.14:

Nov 14 09:27:06 asl95 kernel: ACPI: PCI Interrupt 0000:00:03.2[A] ->
GSI 10 (level, low) -> IRQ 193
Nov 14 09:27:06 asl95 kernel: ehci_hcd 0000:00:03.2: EHCI Host Controller
Nov 14 09:27:06 asl95 kernel: ehci_hcd 0000:00:03.2: new USB bus
registered, assigned bus number 1
Nov 14 09:27:06 asl95 kernel: ehci_hcd 0000:00:03.2: irq 193, io mem 0xfebfd000
Nov 14 09:27:06 asl95 kernel: ehci_hcd 0000:00:03.2: USB 2.0
initialized, EHCI 1.00, driver 10 Dec 2004
Nov 14 09:27:07 asl95 kernel: hub 1-0:1.0: USB hub found
Nov 14 09:27:07 asl95 kernel: hub 1-0:1.0: 4 ports detected
Nov 14 09:27:07 asl95 kernel: hub 1-0:1.0: over-current change on port 1
Nov 14 09:27:07 asl95 kernel: ACPI: PCI Interrupt 0000:00:03.0[A] ->
GSI 10 (level, low) -> IRQ 193
Nov 14 09:27:07 asl95 kernel: ohci_hcd 0000:00:03.0: OHCI Host Controller
Nov 14 09:27:07 asl95 kernel: ohci_hcd 0000:00:03.0: new USB bus
registered, assigned bus number 2
Nov 14 09:27:07 asl95 kernel: ohci_hcd 0000:00:03.0: irq 193, io mem 0xfebfb000
Nov 14 09:27:07 asl95 kernel: hub 2-0:1.0: USB hub found
Nov 14 09:27:07 asl95 kernel: hub 2-0:1.0: 2 ports detected
Nov 14 09:27:07 asl95 kernel: ACPI: PCI Interrupt 0000:00:03.1[A] ->
GSI 10 (level, low) -> IRQ 193
Nov 14 09:27:08 asl95 kernel: ohci_hcd 0000:00:03.1: OHCI Host Controller
Nov 14 09:27:08 asl95 kernel: irq 193: nobody cared!

I don't see this behavior under kernel 2.6.12.  Running git-bisect, I
narrowed it down to this change:

d49d431744007cec0ee1a3ade96f9e0f100c7907 is first bad commit
diff-tree d49d431744007cec0ee1a3ade96f9e0f100c7907 (from
9198769363d4dc1d63d49ec b2e2b189aceb42d94)
Author: David Brownell <david-b@xxxxxxxxxxx>
Date:   Sat May 7 13:21:50 2005 -0700

    [PATCH] USB: misc ehci updates

    Various minor EHCI updates

       * Dump some more info in the debug dumps, notably the product
         description (e.g. chip vendor), BIOS handhake flags, and
         debug port status (when it's not managed by the HCD).

       * Minor updates to the BIOS handoff code:  always flag the HCD
         as owned by Linux (in case BIOS doesn't grab it "early"),
         and on the buggy-BIOS path always match the "early handoff"
         code and forcibly disable SMI IRQs.

       * For the disabled 64bit DMA support, there's now a constant
         to use for the mask; use it.

    Signed-off-by: David Brownell <dbrownell@xxxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

:040000 040000 e883b4103743cfeb337c5b914affcdcb51adc23f
c55d891960ce2b85c70a9b43 2730c3a4aa70261c M      drivers

Reverting this patch restores the original behavior.  Also, I only see
this error if USB legacy support is _disabled_ in the BIOS.  If I
enable legacy support, then the error goes away.

Mike
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