Subject: Re: [PATCH 1/3] powerpc/powernv: remove the unused pnv_pci_set_p2p function

From: Christoph Hellwig <[email-masked]>
Date: Tue, 9 Jul 2019 17:08:53 +0200

On Tue, Jul 09, 2019 at 06:06:54PM +0300, Max Gurtovoy wrote:
> Also this code was merged before the p2p API for p2pmem.

Yes, without a single user or intention to submit a user, and without
covering the most useful use case (PCIe switches).  While at the same
time the people involved completely ignored the PCIe P2P discussions
that have been going on the PCI list for a long time.

This is a text book example of why code needs to be upstream first
with a broad discussion instead of slipping some crap in for out
of tree drivers.