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Re: [PATCH] ar9170usb: add mode-switching for AVM Fritz!WLAN USB N devices in cdrom mode

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Josua Dietze schrieb:
> Frank Schaefer schrieb:
>
>> I really think the mode-switching should be done in the kernel and not
>> in user-space for reasons of usability.
>
> What is wrong with an udev rule entry? By the way, did the "eject"
> command line tool work as well?
It returns an error but the device is ejected.
But do you really want the users to open a terminal window and call
"eject" each time they plug their device in ;) ?
>> It also doesn't "pollute" the driver with much code (adds a single
>> usb_bulk_msg()).
>
> That may be true for a single device but there are around 30+ others
> which are switched outside the kernel, some inside usb-storage, and
> this would add even more places where mode switching happened.
Of course I like the idea of having all mode-switches at the same place,
but we learnt from discussions in the past that there will likely never
be a unified solution for all devices.
Devices are to different. Some disconnect and change their IDs and
others only change their interface-setup.
In addition to that it depends on the purpose/type of the two devices.
In this case, the only purpose of the storage device is to provide
windows-drivers for installation. When the driver is installed, the
storage-device should not appear any more.
>> Another benfit is that it binds the mode-switching to the driver. If the
>> driver is blacklisted/not used, there will be no mode-switching.
>
> But how would you access the storage part of the device then?
>
> Josua
Never, that's the compromise we have to make. But we can really make it,
simply because we will never need it.
Please let me know if there is a possibility to "keep" the
usb-mass-storage-driver as "fallback-driver".

Frank
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