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PCI/P2PDMA: Allow IOMMU for host bridge whitelist

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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: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Logan Gunthorpe 2019-08-12 11:30:47 -06:00 committed by Bjorn Helgaas
parent 5d52e1abcd
commit 5daf40b039
1 changed files with 0 additions and 4 deletions
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4
drivers/pci/p2pdma.c
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@ -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);