On Mon, Mar 26, 2018 at 09:50:38AM +0800, Ming Lei wrote:

Given no many callers of blk_mq_pci_map_queues(), I suggest to add the
parameter of 'offset' to this API directly, then people may keep the 
'.pre_vectors' stuff in mind, and avoid to misuse it.

Yeah, I think I have to agree. I was trying really hard to not touch
other drivers, but the concept doesn't seem odd enough to justify hiding
it behind a default parameter. I'll send v2 tomorrow if there's no other
feedback.