iommu/exynos: Suppress unbinding to prevent system failure
Subsystems (4)
Marek Szyprowski
maintainerPATCH 1/1 iommu/exynos: Suppress unbinding to prevent system failure
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.
--- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+)
drivers/iommu/exynos-iommu.c +1 -0
@@ -681,6 +681,7 @@ 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, } };
Signature · 1 line
1.9.2
PATCH 1/1 iommu/exynos: Suppress unbinding to prevent system failure
Quoted 11 lines · Marek Szyprowski
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 <[email protected]>CC stable at vger.kernel.org # v4.2+--- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+)
Best regards,
Krzysztof