Commit 5c5c8741 authored Jul 27, 2018 by Dmitry Osipenko Committed by Joerg Roedel Jul 27, 2018

iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU-VMSA



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>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

parent 15021d36

drivers/iommu/ipmmu-vmsa.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1108,12 +1108,19 @@ 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;