hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

iommu: Don't print warning when IOMMU driver only supports unmanaged domains 

Print the warning about the fall-back to IOMMU_DOMAIN_DMA in
iommu_group_get_for_dev() only when such a domain was
actually allocated.

Otherwise the user will get misleading warnings in the
kernel log when the iommu driver used doesn't support
IOMMU_DOMAIN_DMA and IOMMU_DOMAIN_IDENTITY.

Fixes: fccb4e3b8a ('iommu: Allow default domain type to be set on the kernel command line')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2019-03-22 16:52:17 +01:00
parent 8c2ffd9174
commit 8bc32a2856
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/iommu/iommu.c
View File

@ -1105,10 +1105,12 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev)
dom = __iommu_domain_alloc(dev->bus, iommu_def_domain_type); dom = __iommu_domain_alloc(dev->bus, iommu_def_domain_type);
if (!dom && iommu_def_domain_type != IOMMU_DOMAIN_DMA) { if (!dom && iommu_def_domain_type != IOMMU_DOMAIN_DMA) {
dev_warn(dev,
"failed to allocate default IOMMU domain of type %u; falling back to IOMMU_DOMAIN_DMA",
iommu_def_domain_type);
dom = __iommu_domain_alloc(dev->bus, IOMMU_DOMAIN_DMA); dom = __iommu_domain_alloc(dev->bus, IOMMU_DOMAIN_DMA);
if (dom) {
dev_warn(dev,
"failed to allocate default IOMMU domain of type %u; falling back to IOMMU_DOMAIN_DMA",
iommu_def_domain_type);
}
} }
group->default_domain = dom; group->default_domain = dom;