Re: [PATCH] usbcore: Add quirk for 255-bytes initial config read

[Nikhil Solanke]

I have a v2 patch ready with all the requested changes along with the
documentation in Documentation/admin-guide/kernel-parameters.txt. Is
there any other place where I have to write documentation?

Also, I would like to know the "low-level" type reason as to why do we
have 2 separate buffers. a desc and then a bigbuffer? Why don't we
just realloc the desc buffer? Does this have something to do with
reallocs in general?

Also (a bit more tangent), can the usb device potentially fingerprint
the host os? if we are asking for 9 bytes first and windows ask for
255, is it possible that some usb devices will fingerprint the OS
based on this, and behave differently? are there any other such places
where fingerprinting is possible? In those cases, is it theoretically
possible that this patch might fix some weird devices that "seem to
work" on windows but not on linux? I might just add this one line to
documentation that it might theoretically fix other usb devices as
well instead of it just being a quirk to fix a game controller.

Nikhil Solanke