uas module not loaded automatically

[Jan Kiszka <jan.kiszka@web.de>]

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Hi all,

I'm migrating this conversation over from LKML as it is probably a kmod
issue. I've just retried the scenario with kmod 18 (from OpenSUSE
Factory) and can still confirm it. Please see below for details.

On 2014-10-05 11:54, Hans de Goede wrote:
> Hi,
> 
> On 10/05/2014 11:48 AM, Jan Kiszka wrote:
>> On 2014-10-05 11:43, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 10/05/2014 11:31 AM, Jan Kiszka wrote:
>>>> 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.
>>>
>>> Hmm, that is not all that old, I would expect that to work.
>>>
>>> Here is how things "work" on my system:
>>>
>>> [hans@shalem ~]$ lsmod | grep uas
>>> uas                    22414  0
>>> usb_storage            65065  1 uas
>>> [hans@shalem ~]$ sudo rmmod uas
>>> [hans@shalem ~]$ lsmod | grep uas
>>> [hans@shalem ~]$ sudo modprobe usb:v174Cp5136d0100dc00dsc00dp00ic08isc06ip50in00
>>> [hans@shalem ~]$ lsmod | grep uas
>>> uas                    22414  0
>>> usb_storage            65065  1 uas
>>>
>>> So as you can see the modalias taken from your udev debug output causes
>>> uas to get loaded, can you try the above ?
>>
>> That command sequence doesn't cause uas to be reloaded. Anything I need
>> to customize for my setup?
> 
> Not that I know of, so this seems to be a modprobe issue, and this should
> probably be taken to the relevant list for modprobe. Please put me in the CC
> when you send a mail there, and you likely will want to include the output
> of the above commands + the modinfo output for both uas and usb-storage.
> 
>>
>>>
>>> Also what does "modinfo uas" say? For me it says:
>>>
>>> [hans@shalem ~]$ modinfo uas
>>> filename:       /lib/modules/3.17.0-rc6+/kernel/drivers/usb/storage/uas.ko
>>> author:         Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp
>>> license:        GPL
>>> alias:          usb:v*p*d*dc*dsc*dp*ic08isc06ip62in*
>>> alias:          usb:v*p*d*dc*dsc*dp*ic08isc06ip50in*
>>> alias:          usb:v174Cp5106d*dc*dsc*dp*ic*isc*ip*in*
>>> alias:          usb:v152Dp0567d*dc*dsc*dp*ic*isc*ip*in*
>>> alias:          usb:v0BC2pAB20d*dc*dsc*dp*ic*isc*ip*in*
>>> alias:          usb:v0BC2p3312d*dc*dsc*dp*ic*isc*ip*in*
>>> alias:          usb:v0BC2p2312d*dc*dsc*dp*ic*isc*ip*in*
>>> depends:        usb-storage
>>> vermagic:       3.17.0-rc6+ SMP mod_unload
>>> signer:         Magrathea: Glacier signing key
>>> sig_key:        9B:56:00:B2:C4:97:8D:4A:A9:B3:0B:54:32:F7:B7:B2:2F:3E:FB:D8
>>> sig_hashalgo:   sha256
>>>
>>> Note the alias-es with vendor and product ids are from quirks, and your version
>>> will likely not have these. But the first 2 generic ones should be there, and
>>> match the modalias from the udev output.
>>
>> filename:       /lib/modules/3.17.0-rc7-homebrewed+/kernel/drivers/usb/storage/uas.ko
>> author:         Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp
>> license:        GPL
>> srcversion:     597B27EF314ADC559827CBD
>> alias:          usb:v*p*d*dc*dsc*dp*ic08isc06ipAAin*
>> alias:          usb:v*p*d*dc*dsc*dp*ic08isc06ip62in*
>> alias:          usb:v*p*d*dc*dsc*dp*ic08isc06ip50in*
>> depends:        usb-storage
>> intree:         Y
>> vermagic:       3.17.0-rc7-homebrewed+ SMP preempt mod_unload modversions 
> 
> That looks good, so no idea why modprobe is not loading it.
> 
> Regards,
> 
> Hans
> 
> 

For reference, here is the lsusb -v of the device again (to prove that
it should match the alias):

Bus 002 Device 010: ID 174c:5136 ASMedia Technology Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               3.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         9
  idVendor           0x174c ASMedia Technology Inc.
  idProduct          0x5136
  bcdDevice            1.00
  iManufacturer           2 Delock
  iProduct                3 42514
  iSerial                 1 200000000CB4
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          121
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower               36mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           4
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     98
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
        MaxStreams             16
        Data-in pipe (0x03)
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
        MaxStreams             16
        Data-out pipe (0x04)
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst              15
        MaxStreams             16
        Status pipe (0x02)
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0400  1x 1024 bytes
        bInterval               0
        bMaxBurst               0
        Command pipe (0x01)
Binary Object Store Descriptor:
  bLength                 5
  bDescriptorType        15
  wTotalLength           22
  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
    bLength                 7
    bDescriptorType        16
    bDevCapabilityType      2
    bmAttributes   0x00000002
      Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
    bLength                10
    bDescriptorType        16
    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000e
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat          10 micro seconds
    bU2DevExitLat        2047 micro seconds
Device Status:     0x0001
  Self Powered

Thanks,
Jan


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