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iommu: Fix htmldocs warnings in sysfs-kernel-iommu_groups 

Below warnings are fixed:

Documentation/ABI/testing/sysfs-kernel-iommu_groups:38: WARNING: Unexpected indentation.
Documentation/ABI/testing/sysfs-kernel-iommu_groups:38: WARNING: Block quote ends without a blank line; unexpected unindent.
Documentation/ABI/testing/sysfs-kernel-iommu_groups:38: WARNING: Enumerated list ends without a blank line; unexpected unindent.
Documentation/ABI/testing/sysfs-kernel-iommu_groups:38: WARNING: Unexpected indentation.
Documentation/ABI/testing/sysfs-kernel-iommu_groups:38: WARNING: Block quote ends without a blank line; unexpected unindent.

Fixes: 63a816749d ("iommu: Document usage of "/sys/kernel/iommu_groups/<grp_id>/type" file")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/linux-next/20201126174851.200e0e58@canb.auug.org.au/
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20201126090603.1511589-1-baolu.lu@linux.intel.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Lu Baolu 2020-11-26 17:06:03 +08:00 committed by Will Deacon
parent 63a816749d
commit 62c9917d9c
1 changed files with 17 additions and 16 deletions
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27
Documentation/ABI/testing/sysfs-kernel-iommu_groups
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@ -40,23 +40,24 @@ KernelVersion: v5.11
Contact: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Description: /sys/kernel/iommu_groups/<grp_id>/type shows the type of default
domain in use by iommu for this group. See include/linux/iommu.h
for possible values. A privileged user could request kernel to
change the group type by writing to this file. Presently, only
three types of request are supported:
1. DMA: All the DMA transactions from the device in this group
for possible read values. A privileged user could request kernel to
change the group type by writing to this file. Valid write values:
======== ======================================================
DMA All the DMA transactions from the device in this group
are translated by the iommu.
2. identity: All the DMA transactions from the device in this
group are *not* translated by the iommu.
3. auto: Change to the type the device was booted with.
Note:
-----
identity All the DMA transactions from the device in this group
are not translated by the iommu.
auto Change to the type the device was booted with.
======== ======================================================
The default domain type of a group may be modified only when
1. The group has *only* one device
2. The device in the group is not bound to any device driver.
- The group has only one device.
- The device in the group is not bound to any device driver.
So, the users must unbind the appropriate driver before
changing the default domain type.
Caution:
--------
Unbinding a device driver will take away the driver's control
over the device and if done on devices that host root file
system could lead to catastrophic effects (the users might