| Message ID | 1463752114-23653-1-git-send-email-m.szyprowski@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On 05/20/2016 03:48 PM, Marek Szyprowski wrote: > 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 <m.szyprowski@samsung.com> > CC: stable@vger.kernel.org # v4.2+ > --- > drivers/iommu/exynos-iommu.c | 1 + > 1 file changed, 1 insertion(+) Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 558a40d3a6a0..d365c40a7b84 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -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, } };
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 <m.szyprowski@samsung.com> CC: stable@vger.kernel.org # v4.2+ --- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+)