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authorRobin Murphy <robin.murphy@arm.com>2015-07-22 20:47:00 +0300
committerJoerg Roedel <jroedel@suse.de>2015-08-03 17:07:49 +0300
commit7b0ce727bf7ac5240a433109f53bf78788f9159b (patch)
tree08b6824b5c96d58d0045aa65d61d7cc46592b0c5 /drivers/iommu/of_iommu.c
parent74d33293e467df61de1b1d8b2fbe29e550dec33b (diff)
downloadlinux-7b0ce727bf7ac5240a433109f53bf78788f9159b.tar.xz
of: iommu: Silence misleading warning
Printing "IOMMU is currently not supported for PCI" for every PCI device probed on a DT-based system proves to be both irritatingly noisy and confusing to users who have misinterpreted it to mean they can no longer use VFIO device assignment. Since configuring DMA masks for PCI devices via of_dma_configure() has not in fact changed anything with regard to IOMMUs there really is nothing to warn about here; shut it up. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/of_iommu.c')
-rw-r--r--drivers/iommu/of_iommu.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 43429ab62228..60ba238090d9 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -141,10 +141,12 @@ struct iommu_ops *of_iommu_configure(struct device *dev,
struct iommu_ops *ops = NULL;
int idx = 0;
- if (dev_is_pci(dev)) {
- dev_err(dev, "IOMMU is currently not supported for PCI\n");
+ /*
+ * We can't do much for PCI devices without knowing how
+ * device IDs are wired up from the PCI bus to the IOMMU.
+ */
+ if (dev_is_pci(dev))
return NULL;
- }
/*
* We don't currently walk up the tree looking for a parent IOMMU.