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| author | Dmitry Osipenko <digetx@gmail.com> | 2018-07-27 00:19:16 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-07-27 10:50:57 +0300 |
| commit | 5c5c87411488af3cd082221e567498d813d0fe83 (patch) | |
| tree | 3d44f6ac09eddfdbb69c7dbc62df2a98deb6aac8 | |
| parent | 15021d364d17b658f489aa654d96a4c81a71f386 (diff) | |
| download | linux-5c5c87411488af3cd082221e567498d813d0fe83.tar.xz | |
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>
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 41eee3401f05..51af2c528a31 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -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; |