Re: [PATCH] usb-storage: ignore ZTE MF 823 in mode 0x1225

[Lars Melin <larsm17@gmail.com>]

On 2015-07-02 20:01, Oliver Neukum wrote:
> On Thu, 2015-07-02 at 14:43 +0200, Oliver Neukum wrote:
>> On Wed, 2015-07-01 at 22:50 +0700, Lars Melin wrote:
>>
>>> Then I would like to see an lsusb listing for 19d2:1225 with an SD-card
>>> interface, I have only seen 19d2:1225 with a single storage interface
>>> which is for the windows install cd-rom.
>>> There are almost no 3G dongles having the SD-card interface active in
>>> default (non-switched) mode.
>>
>> Though I see your point. Is the switching desirable at all for this
>> device or do I need to block the device on the SCSI level?
>>
>> 	Regards
>> 		Oliver
>
> However, when I reinstall usb_modeswitch I see that the storage
> functionality is unnecessary to switch this device.
>
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: new high-speed USB device number 8 using xhci_hcd
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: New USB device found, idVendor=19d2, idProduct=1225
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: Product: ZTE WCDMA Technologies MSM
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: Manufacturer: ZTE,Incorporated
> Jul 02 14:56:10 linux-dtbq.site kernel: usb 3-10: SerialNumber: MF8230ZTED010000CP261718U46EM0SHF3BW707_8C65&&&&&&&&&&&&&&&&&&&0
> Jul 02 14:56:10 linux-dtbq.site kernel: usb-storage 3-10:1.0: USB Mass Storage device detected
> Jul 02 14:56:10 linux-dtbq.site kernel: Vendor: 0x19d2, Product: 0x1225, Revision: 0xf0f1
> Jul 02 14:56:10 linux-dtbq.site kernel: Interface Subclass: 0x06, Protocol: 0x50
> Jul 02 14:56:10 linux-dtbq.site kernel: usb-storage 3-10:1.0: device ignored
> Jul 02 14:56:10 linux-dtbq.site kernel: storage_probe() failed
> Jul 02 14:56:10 linux-dtbq.site kernel: -- sending exit command to thread
> Jul 02 14:56:10 linux-dtbq.site mtp-probe[2730]: checking bus 3, device 8: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-10"
> Jul 02 14:56:10 linux-dtbq.site mtp-probe[2730]: bus: 3, device: 8 was not an MTP device
> Jul 02 14:56:10 linux-dtbq.site usb_modeswitch[2740]: switch device 19d2:1225 on 003/008
> Jul 02 14:56:15 linux-dtbq.site kernel: usb 3-10: USB disconnect, device number 8
> Jul 02 14:56:16 linux-dtbq.site kernel: usb 3-10: new high-speed USB device number 9 using xhci_hcd
>
> 	Regards
> 		Oliver
>

Yes but there are other 19d2:1225 devices which don't have dual-mode 
(19d2:1403 RNDIS or 19d2:1405 ECM) they do only have one of the modes 
and they don't auto-flip so they need usb_modeswitch.

This is the first 3G dongle I have seen with multiple LUN on the same 
USB interface, there has always been one interface for each storage 
function in the past. So yes I jumped to conclusion..

Anyway, it would be good if you could block the MMC interface on LUN 
level while still having the virtual cd-rom working.

cheers
/Lars