4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Dmitry Osipenko <[email protected]> commit 5c5c87411488af3cd082221e567498d813d0fe83 upstream. This fixes kernel crashing on NVIDIA Tegra if kernel is compiled in a multiplatform configuration and IPMMU-VMSA driver is enabled. Cc: <[email protected]> # v3.20+ Signed-off-by: Dmitry Osipenko <[email protected]> Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/iommu/ipmmu-vmsa.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -1081,12 +1081,19 @@ static struct platform_driver ipmmu_driv 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;
