This fixes kernel crashing on NVIDIA Tegra if kernel is compiled in
a multiplatform configuration and IPMMU-VMSA driver is enabled.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.20+
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/iommu/ipmmu-vmsa.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index 9e8495762bc8..78c50db9cd71 100644
--- a/drivers/iommu/ipmmu-vmsa.c
+++ b/drivers/iommu/ipmmu-vmsa.c
@@ -1109,12 +1109,19 @@ static struct platform_driver ipmmu_driver = {
static int __init ipmmu_init(void)
{
+ struct device_node *np;
static bool setup_done;
int ret;
if (setup_done)
return 0;
+ np = of_find_matching_node(NULL, ipmmu_of_ids);
+ if (!np)
+ return 0;
+
+ of_node_put(np);
+
ret = platform_driver_register(&ipmmu_driver);
if (ret < 0)
return ret;
--
2.18.0
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