>From bug https://bugzilla.kernel.org/show_bug.cgi?id=32432 - I was advised to post it here. patch referred to is on bugtracker. After commit b963801164618e25fbdc0cd452ce49c3628b46c8 (USB: ehci-hcd unlink speedups) I have instability with an external USB drive on a Intel Mac Mini. USB device will stop working after some minutes/hours/or a few days. Manually reverting the commit fixes it and the USB device is completely stable. I spent a long time trying to track the bug down, firstly trying every single USB quirk mode and kernel configs, and eventually found reverting this commit fixed it. I am currently running a 2.6.27 kernel with the attached patch. The patch still applies to GIT HEAD as of 01/04/2011 The errors looked like Jun 7 22:56:05 malus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2 Jun 7 22:56:16 malus kernel: usb 1-1: reset high speed USB device using ehci_hcd and address 2 Jun 7 22:56:19 malus kernel: usb 1-1: USB disconnect, address 2 Jun 7 22:56:20 malus kernel: sd 4:0:0:0: Device offlined - not ready after error recovery the usb device in question: root@malus:/usr/local/src# cat /proc/scsi/usb-storage/4 Host scsi4: usb-storage Vendor: Super Top Product: USB 2.0 IDE DEVICE Serial Number: ST Killer Protocol: Transparent SCSI Transport: Bulk Quirks: IGNORE_RESIDUE Has a quirk active by default, but as everything was fine prior to the patch and the fact that I am not the only person who has had issues with this commit, I wonder if there is a problem in the code somewhere or something that could be done. Other people with issues pointing to that commit http://lkml.org/lkml/2009/5/22/405 (USB/DVB - Old Technotrend TT-connect S-2400 regression tracked down) http://kerneltrap.com/mailarchive/linux-usb/2008/12/19/4459054/thread 9usb: Fix PS3 EHCI suspend) hardware on machine 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) 00:07.0 Performance counters: Intel Corporation Device 27a3 (rev 03) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 02) 00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 02) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 02) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 02) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 02) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA AHCI Controller (rev 02) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 02) 01:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit Ethernet Controller (rev 22) 02:00.0 Ethernet controller: Atheros Communications Inc. AR5001 Wireless Network Adapter (rev 01) 03:03.0 FireWire (IEEE 1394): Agere Systems FW322/323 (rev 61) let me know if I can provide other information. The machine is question is a production machine in a hosting facility, so my priority was to get this working as I have now. Best Regards Jools -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
