diff options
| author | Geert Uytterhoeven | 2019-05-27 13:52:48 +0200 |
|---|---|---|
| committer | Joerg Roedel | 2019-06-03 12:18:02 +0200 |
| commit | 80eaa9f558134a31c10dddb156d347b9c983290e (patch) | |
| tree | ddbcdc9649a33efc58fbaa188f73dfc55a7c92df /drivers/iommu/ipmmu-vmsa.c | |
| parent | Linux 5.2-rc3 (diff) | |
| download | kernel-qcow2-linux-80eaa9f558134a31c10dddb156d347b9c983290e.tar.gz kernel-qcow2-linux-80eaa9f558134a31c10dddb156d347b9c983290e.tar.xz kernel-qcow2-linux-80eaa9f558134a31c10dddb156d347b9c983290e.zip | |
iommu/ipmmu-vmsa: Link IOMMUs and devices in sysfs
As of commit 7af9a5fdb9e0ca33 ("iommu/ipmmu-vmsa: Use
iommu_device_sysfs_add()/remove()"), IOMMU devices show up under
/sys/class/iommu/, but their "devices" subdirectories are empty.
Likewise, devices tied to an IOMMU do not have an "iommu" backlink.
Make sure all links are created, on both arm32 and arm64.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/ipmmu-vmsa.c')
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 9a380c10655e..9f2b781e20a0 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -885,27 +885,37 @@ error: static int ipmmu_add_device(struct device *dev) { + struct ipmmu_vmsa_device *mmu = to_ipmmu(dev); struct iommu_group *group; + int ret; /* * Only let through devices that have been verified in xlate() */ - if (!to_ipmmu(dev)) + if (!mmu) return -ENODEV; - if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA)) - return ipmmu_init_arm_mapping(dev); + if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA)) { + ret = ipmmu_init_arm_mapping(dev); + if (ret) + return ret; + } else { + group = iommu_group_get_for_dev(dev); + if (IS_ERR(group)) + return PTR_ERR(group); - group = iommu_group_get_for_dev(dev); - if (IS_ERR(group)) - return PTR_ERR(group); + iommu_group_put(group); + } - iommu_group_put(group); + iommu_device_link(&mmu->iommu, dev); return 0; } static void ipmmu_remove_device(struct device *dev) { + struct ipmmu_vmsa_device *mmu = to_ipmmu(dev); + + iommu_device_unlink(&mmu->iommu, dev); arm_iommu_detach_device(dev); iommu_group_remove_device(dev); } |