On 07/13/2017 04:25 AM, Stephen Boyd wrote:
On 07/06, Vivek Gautam wrote:
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index ddbfa8ab69e6..75567d9698ab 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1348,6 +1348,7 @@ static int arm_smmu_add_device(struct device *dev)
struct arm_smmu_device *smmu;
struct arm_smmu_master_cfg *cfg;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
+ struct device_link *link = NULL;
Unnecessary initialization?
Right, will drop this.
Thanks.
int i, ret;
if (using_legacy_binding) {
@@ -1403,6 +1404,16 @@ static int arm_smmu_add_device(struct device *dev)
pm_runtime_put_sync(smmu->dev);
+ /*
+ * Establish the link between smmu and master, so that the
+ * smmu gets runtime enabled/disabled as per the master's
+ * needs.
+ */
+ link = device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME);
+ if (!link)
+ dev_warn(smmu->dev, "Unable to create device link between %s and
%s\n",
+ dev_name(smmu->dev), dev_name(dev));
+
return 0;
--
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