Subject: [PATCH 4/4] iommu/arm-smmu: Add the device_link between masters and smmu

From: [email-masked] (Sricharan)
Date: Wed, 26 Oct 2016 09:44:05 +0530

Hi Marek,

>
>On 2016-10-21 19:14, Sricharan R wrote:
>> The device link between master and its smmu is added so that
>> the smmu gets runtime enabled/disabled when the master needs it.
>> This is done from add_device callback which gets called once
>> when the master is added to the smmu group.
>>
>> Signed-off-by: Sricharan R <[email-masked]>
>> ---
>>   drivers/iommu/arm-smmu.c | 9 +++++++++
>>   1 file changed, 9 insertions(+)
>>
>> diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
>> index 578cdc2..71ce4b6 100644
>> --- a/drivers/iommu/arm-smmu.c
>> +++ b/drivers/iommu/arm-smmu.c
>> @@ -1470,6 +1470,15 @@ static int arm_smmu_add_device(struct device *dev)
>>   		goto out_free;
>>   	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.
>> +	 */
>> +
>> +	device_link_add(dev, smmu->dev, DEVICE_LINK_AVAILABLE,
>> +			DEVICE_LINK_PM_RUNTIME);
>
>Please update to the latest version of Rafael's patches. In V5 the
>initial link
>state is not needed anymore and there was an important fix for creating
>links
>during master's driver probing, what happens after applying your IOMMU
>deferred
>probe patchset.

   Sure i will update to V5. I see that i am on V4.

Regards,
 Sricharan