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iommu/arm-smmu: Fix broken ATOS check

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Commit 83a60ed8f0 ("iommu/arm-smmu: fix ARM_SMMU_FEAT_TRANS_OPS
condition") accidentally negated the ID0_ATOSNS predicate in the ATOS
feature check, causing the driver to attempt ATOS requests on SMMUv2
hardware without the ATOS feature implemented.

This patch restores the predicate to the correct value.

Cc: <[email protected]> # 4.0+
Reported-by: Varun Sethi <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Will Deacon 2015-06-29 17:47:42 +01:00 • committed by Joerg Roedel
commit d38f0ff9ab
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@ -1566,7 +1566,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
return -ENODEV;
}
if ((id & ID0_S1TS) && ((smmu->version == 1) || (id & ID0_ATOSNS))) {
if ((id & ID0_S1TS) && ((smmu->version == 1) || !(id & ID0_ATOSNS))) {
smmu->features |= ARM_SMMU_FEAT_TRANS_OPS;
dev_notice(smmu->dev, "\taddress translation ops\n");
}