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| author | Will Deacon <will.deacon@arm.com> | 2015-05-27 18:09:35 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-05-29 11:12:01 +0200 |
| commit | e3ce0c940e02e4d9d09c1c1377f80d9e90a893a0 (patch) | |
| tree | f0180e9eb0c4c866180c67c581ee24c2342082bb /drivers/iommu | |
| parent | iommu/arm-smmu: Fix ATS1* register writes (diff) | |
| download | linux-e3ce0c940e02e4d9d09c1c1377f80d9e90a893a0.tar.xz linux-e3ce0c940e02e4d9d09c1c1377f80d9e90a893a0.zip | |
iommu/arm-smmu: Make force_stage module param read-only in sysfs
Changing force_stage dynamically isn't supported by the driver and it
also doesn't make a whole lot of sense to change it once the SMMU is up
and running.
This patch makes the sysfs entry for the parameter read-only.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index e2a788eea5ed..dce041b1c139 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -246,7 +246,7 @@ #define FSYNR0_WNR (1 << 4) static int force_stage; -module_param_named(force_stage, force_stage, int, S_IRUGO | S_IWUSR); +module_param_named(force_stage, force_stage, int, S_IRUGO); MODULE_PARM_DESC(force_stage, "Force SMMU mappings to be installed at a particular stage of translation. A value of '1' or '2' forces the corresponding stage. All other values are ignored (i.e. no stage is forced). Note that selecting a specific stage will disable support for nested translation."); |