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Date: Thu, 24 Jul 2025 09:52:38 +0200
From: Christoph Hellwig <hch@lst.de>
To: Leon Romanovsky <leon@kernel.org>
Cc: Alex Williamson <alex.williamson@redhat.com>,
	Leon Romanovsky <leonro@nvidia.com>, Christoph Hellwig <hch@lst.de>,
	Jason Gunthorpe <jgg@nvidia.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Christian =?iso-8859-1?Q?K=F6nig?= <christian.koenig@amd.com>,
	dri-devel@lists.freedesktop.org, iommu@lists.linux.dev,
	Jens Axboe <axboe@kernel.dk>,
	=?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>,
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	linux-mm@kvack.org, linux-pci@vger.kernel.org,
	Logan Gunthorpe <logang@deltatee.com>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Vivek Kasireddy <vivek.kasireddy@intel.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH 03/10] PCI/P2PDMA: Simplify bus address mapping API
Message-ID: <20250724075238.GC30590@lst.de>
References: <cover.1753274085.git.leonro@nvidia.com> <30640b5e4ec975f928e685b92aaaf3e2e5e08f72.1753274085.git.leonro@nvidia.com>
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User-Agent: Mutt/1.5.17 (2007-11-01)

On Wed, Jul 23, 2025 at 04:00:04PM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@nvidia.com>
> 
> Update the pci_p2pdma_bus_addr_map() function to take a direct pointer
> to the p2pdma_provider structure instead of the pci_p2pdma_map_state.
> This simplifies the API by removing the need for callers to extract
> the provider from the state structure.
> 
> The change updates all callers across the kernel (block layer, IOMMU,
> DMA direct, and HMM) to pass the provider pointer directly, making
> the code more explicit and reducing unnecessary indirection. This
> also removes the runtime warning check since callers now have direct
> control over which provider they use.

Again I don't actually see any simplification here.  But maybe I'm
missing the ultimate goal here.