Enable clients' translation only after setting up the swgroups.
Signed-off-by: Navneet Kumar <navne...@nvidia.com>
---
drivers/iommu/tegra-smmu.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index fa175d9..1a44cf6 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -353,6 +353,20 @@ static void tegra_smmu_enable(struct tegra_smmu *smmu,
unsigned int swgroup,
unsigned int i;
u32 value;
+ group = tegra_smmu_find_swgroup(smmu, swgroup);
+ if (group) {
+ value = smmu_readl(smmu, group->reg);
+ value &= ~SMMU_ASID_MASK;
+ value |= SMMU_ASID_VALUE(asid);
+ value |= SMMU_ASID_ENABLE;
+ smmu_writel(smmu, value, group->reg);
+ } else {
+ pr_warn("%s group from swgroup %u not found\n", __func__,
+ swgroup);
+ /* No point moving ahead if group was not found */
+ return;
+ }
+
for (i = 0; i < smmu->soc->num_clients; i++) {
const struct tegra_mc_client *client = &smmu->soc->clients[i];
@@ -363,15 +377,6 @@ static void tegra_smmu_enable(struct tegra_smmu *smmu,
unsigned int swgroup,
value |= BIT(client->smmu.bit);
smmu_writel(smmu, value, client->smmu.reg);
}
-
- group = tegra_smmu_find_swgroup(smmu, swgroup);
- if (group) {
- value = smmu_readl(smmu, group->reg);
- value &= ~SMMU_ASID_MASK;
- value |= SMMU_ASID_VALUE(asid);
- value |= SMMU_ASID_ENABLE;
- smmu_writel(smmu, value, group->reg);
- }
}
static void tegra_smmu_disable(struct tegra_smmu *smmu, unsigned int swgroup,
--
2.7.4
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
