From: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>,
Laurent Pinchart
<laurent.pinchart+renesas-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>,
Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
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 [thread overview]
Message-ID: <20180726211916.10264-1-digetx@gmail.com> (raw)
This fixes kernel crashing on NVIDIA Tegra if kernel is compiled in
a multiplatform configuration and IPMMU-VMSA driver is enabled.
Cc: <stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org> # v3.20+
Signed-off-by: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
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
next reply other threads:[~2018-07-26 21:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-26 21:19 Dmitry Osipenko [this message]
[not found] ` <20180726211916.10264-1-digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2018-07-27 7:51 ` [PATCH v1] iommu/ipmmu-vmsa: Don't register as BUS IOMMU if machine doesn't have IPMMU-VMSA Joerg Roedel
2018-07-27 9:10 ` Laurent Pinchart
2018-08-27 14:20 ` Geert Uytterhoeven
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