Re: [Patch] Increase USBFS Bulk Transfer size

Alan Cox
2011-10-13T19:07:17Z

> For my part, I don't much mind raising the limit from 16 KB to 32 KB.
> 48 KB may be unnecessary, especially since one of the devices doesn't
> even work when the transfer buffer is that large.
>
> However it's just a work-around, not a real solution to the underlying
> problem (whatever that problem turns out to be). Part of the reason
> for keeping the limit low is that it shouldn't matter, since people
> ought to be able to use a bunch of small transfers rather than one
> large transfer. Apparently that justification doesn't work with these
> webcams, although there's no known reason why it shouldn't.
>
> But I'm not the person in charge of these decisions...

Well if the underlying solution is crap hardware with no work around its
a bit hard to avoid. A more conservative approach would be to put the
'constant' in sysfs where it belongs so it can be adjusted and special
cased.

Alan