[PATCH] blk-mq: Fix poll_stat for new size-based bucketing.

[Stephen Bates]

> Thanks, added. BTW, in the future, we have a format for specifying
> if a patch fixes another patch. This should have been:

Thanks!

> Fixes: 720b8ccc4500 ("blk-mq: Add a polling specific stats function")

Duly noted for next time. Apologies for the miss…