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iommu/arm-smmu: don't enable SMMU device until probing has completed 

We currently reset and enable the SMMU before the device has finished
being probed, so if we fail later on (for example, because we couldn't
request a global irq successfully) then we will leave the device in an
active state.

This patch delays the reset and enabling of the SMMU hardware until
probing has completed.

Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2013-08-21 13:56:34 +01:00
parent 6614ee77f4
commit fd90cecbde
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/arm-smmu.c
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@ -1858,8 +1858,6 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
goto out_put_parent;
}
arm_smmu_device_reset(smmu);
for (i = 0; i < smmu->num_global_irqs; ++i) {
err = request_irq(smmu->irqs[i],
arm_smmu_global_fault,
@ -1877,6 +1875,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
spin_lock(&arm_smmu_devices_lock);
list_add(&smmu->list, &arm_smmu_devices);
spin_unlock(&arm_smmu_devices_lock);
arm_smmu_device_reset(smmu);
return 0;
out_free_irqs: