From 5e8d0a429dade5184d894970ef74f33d2d6e62f0 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Fri, 20 May 2016 15:48:21 +0200 Subject: [PATCH] iommu/exynos: Suppress unbinding to prevent system failure commit b54b874fbaf5e024723e50dfb035a9916d6752b4 upstream. Removal of IOMMU driver cannot be done reliably, so Exynos IOMMU driver doesn't support this operation. It is essential for system operation, so it makes sense to prevent unbinding by disabling bind/unbind sysfs feature for SYSMMU controller driver to avoid kernel ops or trashing memory caused by such operation. Signed-off-by: Marek Szyprowski Reviewed-by: Krzysztof Kozlowski Signed-off-by: Joerg Roedel Signed-off-by: Greg Kroah-Hartman --- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 5ecc86cb74c81..e27e3b7df4e73 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -709,6 +709,7 @@ static struct platform_driver exynos_sysmmu_driver __refdata = { .name = "exynos-sysmmu", .of_match_table = sysmmu_of_match, .pm = &sysmmu_pm_ops, + .suppress_bind_attrs = true, } }; -- 2.47.2