Re: [PATCH v2 0/1] MR5490: setupapi: Don't set RequiredSize when SetupDiGetClassDescription* fails.

[Elizabeth Figura (＠zfigura)]

> What do you mean? If RegQueryValueEx runs out of space, it returns ERROR_MORE_DATA. But if the class is installed, SetupDiGetClassDescription writes to RequiredSize whether the buffer is sufficient or not.

Well, we should be translating ERROR_MORE_DATA to ERROR_INSUFFICIENT_BUFFER apparently, but what I mean is, write "ls == ERROR_INSUFFICIENT_BUFFER" instead of "ls != ERROR_FILE_NOT_FOUND".
> Are you just saying that you want to see a test where SetupDiGetClassDescription succeeds and writes to both ClassDescription and RequiredSize?

That would certainly be nice to have, although I guess I wouldn't consider it necessary for the patch.