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authorWill Deacon <will.deacon@arm.com>2013-08-21 13:56:34 +0100
committerWill Deacon <will.deacon@arm.com>2013-09-17 12:03:11 +0100
commitfd90cecbde065eac6ecc3ef38abace725ad27010 (patch)
treeee02fb709bfc734ec6ece4beae4601719558d2e3 /drivers/iommu
parent6614ee77f49d37f9bb77eb3e81431ca8fcc4042e (diff)
downloadlinux-fd90cecbde065eac6ecc3ef38abace725ad27010.tar.bz2
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>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/arm-smmu.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 913bd1565e41..181c9ba929cd 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -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: