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Commit 5daf40b0 authored by Logan Gunthorpe's avatar Logan Gunthorpe Committed by Bjorn Helgaas
Browse files

PCI/P2PDMA: Allow IOMMU for host bridge whitelist 

Now that we map the requests correctly we can remove the iommu_present()
restriction.

Link: https://lore.kernel.org/r/20190730163545.4915-14-logang@deltatee.com
Link: https://lore.kernel.org/r/20190812173048.9186-14-logang@deltatee.com


Signed-off-by: default avatarLogan Gunthorpe <logang@deltatee.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 5d52e1ab

drivers/pci/p2pdma.c

+0 −4
Original line number Diff line number Diff line
@@ -18,7 +18,6 @@ 
#include <linux/percpu-refcount.h>

#include <linux/random.h>

#include <linux/seq_buf.h>

#include <linux/iommu.h>

#include <linux/xarray.h>



enum pci_p2pdma_map_type {
@@ -328,9 +327,6 @@ static bool host_bridge_whitelist(struct pci_dev *a, struct pci_dev *b) 
	struct pci_host_bridge *host_a = pci_find_host_bridge(a->bus);

	struct pci_host_bridge *host_b = pci_find_host_bridge(b->bus);



	if (iommu_present(a->dev.bus) || iommu_present(b->dev.bus))

		return false;



	if (host_a == host_b)

		return __host_bridge_whitelist(host_a, true);