linux-kernel - 3.2-rc2 regression due to commit "USB: EHCI: fix HUB TT scheduling issue with iso transfer" 811c926c538f7e8d3c08b630dd5844efd7e000f6

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Date:	Sat, 26 Nov 2011 16:47:12 +0100
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	stern@...land.harvard.edu, gregkh@...e.de,
	thomas.poussevin@...rot.com
CC:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: 3.2-rc2 regression due to commit "USB: EHCI: fix HUB TT scheduling issue with iso transfer" 811c926c538f7e8d3c08b630dd5844efd7e000f6

Hi all,

The following commit leads to a regression where both my USB videograbbers don't work anymore.
They are attached to a moschip USB controller, everything works fine again after reverting this commit.

commit 811c926c538f7e8d3c08b630dd5844efd7e000f6. "USB: EHCI: fix HUB TT scheduling issue with iso transfer"

This is being spit out:

[   27.694145] ehci_hcd 0000:04:00.5: iso resched full ffff88001938d000 (now 2818 max 6914)
[   27.694151] submit of urb 0 failed (error=-28)
[   28.106290] usbhid 6-1:1.0: disconnect by usbfs
[   28.106309] drivers/usb/core/file.c: removing 96 minor
[   31.771237] ehci_hcd 0000:04:00.5: iso resched full ffff88001abaf800 (now 2669 max 6765)
[   31.771243] submit of urb 0 failed (error=-28)
[   41.764131] ehci_hcd 0000:04:00.5: iso resched full ffff88001abad000 (now 697 max 4793)
[   41.764138] submit of urb 0 failed (error=-28)
[   51.773188] ehci_hcd 0000:04:00.5: iso resched full ffff88001abaf800 (now 2951 max 7047)
[   51.773194] submit of urb 0 failed (error=-28)
[   61.768234] ehci_hcd 0000:04:00.5: iso resched full ffff880013d4a000 (now 996 max 5092)
[   61.768241] submit of urb 0 failed (error=-28)
[   71.769031] ehci_hcd 0000:04:00.5: iso resched full ffff880013d4a800 (now 3183 max 7279)
[   71.769038] submit of urb 0 failed (error=-28)
[   81.767280] ehci_hcd 0000:04:00.5: iso resched full ffff8800139de000 (now 1253 max 5349)
[   81.767287] submit of urb 0 failed (error=-28)
[   91.763237] ehci_hcd 0000:04:00.5: iso resched full ffff8800139de800 (now 3402 max 7498)
[   91.763243] submit of urb 0 failed (error=-28)
[  101.769234] ehci_hcd 0000:04:00.5: iso resched full ffff88001368e000 (now 1535 max 5631)
[  101.769241] submit of urb 0 failed (error=-28)
[  111.767237] ehci_hcd 0000:04:00.5: iso resched full ffff88001368e800 (now 3700 max 7796)
[  111.767243] submit of urb 0 failed (error=-28)



Complete dmesg of a kernel boot with and one without this patch are attached, as well as output from lsusb and lspci.

--
Sander
View attachment "dmesg-usb-error.txt" of type "text/plain" (57782 bytes)

View attachment "dmesg-usb-noerrors.txt" of type "text/plain" (53782 bytes)

View attachment "lspci.txt" of type "text/plain" (3574 bytes)

View attachment "lsusb.txt" of type "text/plain" (61015 bytes)