iommu/arm-smmu: Fix broken ATOS check

Commit 83a60ed8f0b5 ("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: <stable@vger.kernel.org> # 4.0+
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>

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index dce041b1c1394be7057528a5b6fd23dcbbbf6253..4cd0c29cb585000c0e5899651948ad1dc2ffbf1f 100644 (file)
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -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");
        }