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iommu/arm-smmu: Fix broken ATOS check

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commit d38f0ff9ab upstream.

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.

Reported-by: Varun Sethi <varun.sethi@freescale.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Will Deacon
2015-06-29 17:47:42 +01:00
committed by popcornmix
parent bca7a396be
commit dfb8b64e07
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@@ -1533,7 +1533,7 @@ 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");
}