Messages in this thread Patch in this message | | | From | Dmitry Osipenko <> | Subject | [PATCH v1] iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU-VMSA | Date | Fri, 27 Jul 2018 00:19:16 +0300 |
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This fixes kernel crashing on NVIDIA Tegra if kernel is compiled in a multiplatform configuration and IPMMU-VMSA driver is enabled.
Cc: <stable@vger.kernel.org> # v3.20+ Signed-off-by: Dmitry Osipenko <digetx@gmail.com> --- 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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