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Subject[PATCH] iommu/of: Only do IOMMU lookup for available ones
Date
The for_each_matching_node_and_match() would return every matching
nodes including unavailable ones.

It's pointless to init unavailable IOMMUs, so add a sanity check to
avoid that.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---

drivers/iommu/of_iommu.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 50947ebb6d17..6f7456caa30d 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -240,6 +240,9 @@ static int __init of_iommu_init(void)
for_each_matching_node_and_match(np, matches, &match) {
const of_iommu_init_fn init_fn = match->data;

+ if (!of_device_is_available(np))
+ continue;
+
if (init_fn && init_fn(np))
pr_err("Failed to initialise IOMMU %pOF\n", np);
}
--
2.11.0

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