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From:   Logan Gunthorpe <logang@deltatee.com>
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Date:   Tue, 13 Mar 2018 12:40:13 -0600
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Subject: Re: [PATCH v3 01/11] PCI/P2PDMA: Support peer-to-peer memory
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On 12/03/18 09:28 PM, Sinan Kaya wrote:
> Maybe, dev parameter should also be struct pci_dev so that you can get rid of
> all to_pci_dev() calls in this code including find_parent_pci_dev() function.

No, this was mentioned in v2. find_parent_pci_dev is necessary because 
the calling drivers aren't likely to have a bunch of struct pci_dev's 
for all the devices they are working with lying around. It's a much 
nicer from an API stand point to take struct devs and not worth it just 
to have a PCI API only taking struct pci_devs.

Logan