This is a note to let you know that I've just added the patch titled iommu/exynos: Suppress unbinding to prevent system failure to the 4.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iommu-exynos-suppress-unbinding-to-prevent-system-failure.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b54b874fbaf5e024723e50dfb035a9916d6752b4 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Date: Fri, 20 May 2016 15:48:21 +0200 Subject: iommu/exynos: Suppress unbinding to prevent system failure From: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> 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 <m.szyprowski@xxxxxxxxxxx> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -709,6 +709,7 @@ static struct platform_driver exynos_sys .name = "exynos-sysmmu", .of_match_table = sysmmu_of_match, .pm = &sysmmu_pm_ops, + .suppress_bind_attrs = true, } }; Patches currently in stable-queue which might be from m.szyprowski@xxxxxxxxxxx are queue-4.7/s5p-mfc-set-device-name-for-reserved-memory-region-devs.patch queue-4.7/s5p-mfc-add-release-callback-for-memory-region-devs.patch queue-4.7/iommu-exynos-suppress-unbinding-to-prevent-system-failure.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html