From: Joerg Roedel <jroe...@suse.de>
This is required to convert the arm-smmu driver to the
probe/release_device() interface.
Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
drivers/iommu/arm-smmu.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index a6a5796e9c41..3493501d8b2c 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -69,7 +69,7 @@ MODULE_PARM_DESC(disable_bypass,
"Disable bypass streams such that incoming transactions from devices
that are not attached to an iommu domain will report an abort back to the
device and will not be allowed to pass through the SMMU.");
struct arm_smmu_s2cr {
- struct iommu_group *group;
+ struct device *dev;
int count;
enum arm_smmu_s2cr_type type;
enum arm_smmu_s2cr_privcfg privcfg;
@@ -1100,7 +1100,7 @@ static int arm_smmu_master_alloc_smes(struct device *dev)
/* It worked! Now, poke the actual hardware */
for_each_cfg_sme(cfg, fwspec, i, idx) {
arm_smmu_write_sme(smmu, idx);
- smmu->s2crs[idx].group = group;
+ smmu->s2crs[idx].dev = dev;
}
mutex_unlock(&smmu->stream_map_mutex);
@@ -1495,11 +1495,15 @@ static struct iommu_group *arm_smmu_device_group(struct
device *dev)
int i, idx;
for_each_cfg_sme(cfg, fwspec, i, idx) {
- if (group && smmu->s2crs[idx].group &&
- group != smmu->s2crs[idx].group)
+ struct iommu_group *idx_grp = NULL;
+
+ if (smmu->s2crs[idx].dev)
+ idx_grp = smmu->s2crs[idx].dev->iommu_group;
+
+ if (group && idx_grp && group != idx_grp)
return ERR_PTR(-EINVAL);
- group = smmu->s2crs[idx].group;
+ group = idx_grp;
}
if (group)
--
2.17.1
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