linux-kernel - Re: uas: module not loaded automatically

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Date:	Sun, 05 Oct 2014 11:31:43 +0200
From:	Jan Kiszka <jan.kiszka@....de>
To:	Hans de Goede <hdegoede@...hat.com>,
	linux-usb <linux-usb@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: uas: module not loaded automatically

On 2014-10-05 11:23, Hans de Goede wrote:
> Hi,
> 
> On 10/05/2014 11:14 AM, Jan Kiszka wrote:
>> On 2014-10-05 11:08, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 10/04/2014 08:35 PM, Jan Kiszka wrote:
>>>> Hi,
>>>>
>>>> my Delock external USB drive stopped working after updating from a
>>>> UAS-disabled distro kernel to latest 3.17-rc7 with UAS on. That UAS was
>>>> key became clear to me only after looking at storage_probe(): the device
>>>> is ignored by usb-storage if it is UAS-capable. However, nothing causes
>>>> uas.ko to be loaded when the drive is plugged here. How is this supposed
>>>> to work in the normal case?
>>>
>>> Is the uas.ko module installed, and was depmod run after installing it ?
>>
>> Definitely. Just retried after another depmod -a, and only modprobe uas
>> made it work.
>>
>>>
>>> uas.c has the following:
>>>
>>>         { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
>>>         { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) },
>>>
>>> Which should make it load automatically on your device.
>>
>> Should this match with what lsusb -v reports for the device? 
> 
> Yes, and it does, for both alt settings of your device:
> 
>       bInterfaceClass         8 Mass Storage
>       bInterfaceSubClass      6 SCSI
>       bInterfaceProtocol     80 Bulk-Only
> 
>       bInterfaceClass         8 Mass Storage
>       bInterfaceSubClass      6 SCSI
>       bInterfaceProtocol     98
> 
> Where 98 == USB_PR_UAS, seems you have an quite old lsusb if it does not

It says "007".

> know that though. Could it be the rest of your userspace is old too, and is
> not smart enough to load all matching drivers, instead only loading the first matching
> driver (which happens to be usb-storage) ?

OpenSUSE 13.1, all updates installed. Which components are involved?
udev - Version 208? Below is the udevadm monitor output.

Jan

PS: Let me know if I should carry this to a different list.


KERNEL[33578.169824] add      /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb)
ACTION=add
BUSNUM=002
DEVNAME=/dev/bus/usb/002/008
DEVNUM=008
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb2/2-2
DEVTYPE=usb_device
MAJOR=189
MINOR=135
PRODUCT=174c/5136/100
SEQNUM=3702
SUBSYSTEM=usb
TYPE=0/0/0

KERNEL[33578.170171] add      /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0
DEVTYPE=usb_interface
INTERFACE=8/6/80
MODALIAS=usb:v174Cp5136d0100dc00dsc00dp00ic08isc06ip50in00
PRODUCT=174c/5136/100
SEQNUM=3703
SUBSYSTEM=usb
TYPE=0/0/0

UDEV  [33578.171899] add      /devices/pci0000:00/0000:00:14.0/usb2/2-2 (usb)
ACTION=add
BUSNUM=002
DEVNAME=/dev/bus/usb/002/008
DEVNUM=008
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb2/2-2
DEVTYPE=usb_device
ID_BUS=usb
ID_MODEL=42514
ID_MODEL_ENC=42514
ID_MODEL_ID=5136
ID_REVISION=0100
ID_SERIAL=Delock_42514_200000000CB4
ID_SERIAL_SHORT=200000000CB4
ID_USB_INTERFACES=:080650:080662:
ID_VENDOR=Delock
ID_VENDOR_ENC=Delock
ID_VENDOR_FROM_DATABASE=ASMedia Technology Inc.
ID_VENDOR_ID=174c
MAJOR=189
MINOR=135
PRODUCT=174c/5136/100
SEQNUM=3702
SUBSYSTEM=usb
TYPE=0/0/0
USEC_INITIALIZED=578169821

KERNEL[33578.173903] add      /module/usb_storage (module)
ACTION=add
DEVPATH=/module/usb_storage
SEQNUM=3704
SUBSYSTEM=module

KERNEL[33578.174036] add      /bus/usb/drivers/usb-storage (drivers)
ACTION=add
DEVPATH=/bus/usb/drivers/usb-storage
SEQNUM=3705
SUBSYSTEM=drivers

UDEV  [33578.174093] add      /devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:14.0/usb2/2-2/2-2:1.0
DEVTYPE=usb_interface
ID_VENDOR_FROM_DATABASE=ASMedia Technology Inc.
INTERFACE=8/6/80
MODALIAS=usb:v174Cp5136d0100dc00dsc00dp00ic08isc06ip50in00
PRODUCT=174c/5136/100
SEQNUM=3703
SUBSYSTEM=usb
TYPE=0/0/0
USEC_INITIALIZED=8170188

UDEV  [33578.174319] add      /module/usb_storage (module)
ACTION=add
DEVPATH=/module/usb_storage
SEQNUM=3704
SUBSYSTEM=module
USEC_INITIALIZED=578173906

UDEV  [33578.174448] add      /bus/usb/drivers/usb-storage (drivers)
ACTION=add
DEVPATH=/bus/usb/drivers/usb-storage
SEQNUM=3705
SUBSYSTEM=drivers
USEC_INITIALIZED=578174131



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