[EMAIL PROTECTED] wrote:
There are at least four replies:
The factual: It seems you are unaware of the present USB storage code.
For many devices the INQUIRY response is entirely fabricated.
I'm aware of this, but you were complaining of a new device
which you got, so I assumed the INQUIRY response data came
from the device, in your particular situation.
The vicious circle: The SCSI blacklist works by attaching quirks
to vendor and model data. This fails when the quirk is precisely
that vendor and model data are not reported.
I agree with this.
The theoretical: USB-storage is the SCSI host - it is responsible
for presenting the SCSI layer with a device that complies with the
SCSI standard. If any blacklisting is to be done it must be
blacklisting in the USB storage code, not in the SCSI code.
(And that blacklist exists, of course - it is called unusual_devs.h.)
I'm aware of this list.
The practical: USB devices are notoriously bad as far as standard
compliance is concerned. If it works with Windows that is good
enough. That standard, too expensive to implement it all, or,
after implementing, to test it all.
Your philosophy leads to blacklisting almost every USB storage device
(I possess a dozen or so, not a single one without quirks).
Of course that is a possibility: describe for every device on the market
in what ways it fails. But it is counterproductive. When people buy
a new device it would be nice if it worked with Linux immediately,
not first after adding its quirks to some list. Indeed, several times
a week I read someone reporting "add this to unusual_devs.h to make
this device work". No doubt thousands of people just decide that their
device does not work with Linux. In cases where it is possible to
automatically detect and correct faulty data no list of quirks is
required, and more devices will work with Linux out-of-the-box.
Yes, I did understand all this from your first email -- the practicallity
of the matter. This is good.
I was just speaking out of principle, to present the other side.
Sometimes it's better to present a fix out of principle rather than
a particuliarity, this abstractizes further up and provides a long
lasting solution.
But yes, this is a pickle of a problem.
--
Luben
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