From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>,
iommu@lists.linux-foundation.org,
linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Joerg Roedel <joro@8bytes.org>, Inki Dae <inki.dae@samsung.com>,
Kukjin Kim <kgene@kernel.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
stable@vger.kernel.org
Subject: Re: [PATCH] iommu/exynos: Suppress unbinding to prevent system failure
Date: Fri, 20 May 2016 16:02:36 +0200 [thread overview]
Message-ID: <573F18FC.9000506@samsung.com> (raw)
In-Reply-To: <1463752114-23653-1-git-send-email-m.szyprowski@samsung.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: k.kozlowski@samsung.com (Krzysztof Kozlowski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] iommu/exynos: Suppress unbinding to prevent system failure
Date: Fri, 20 May 2016 16:02:36 +0200 [thread overview]
Message-ID: <573F18FC.9000506@samsung.com> (raw)
In-Reply-To: <1463752114-23653-1-git-send-email-m.szyprowski@samsung.com>
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 at 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
next prev parent reply other threads:[~2016-05-20 14:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-20 13:48 [PATCH] iommu/exynos: Suppress unbinding to prevent system failure Marek Szyprowski
2016-05-20 13:48 ` Marek Szyprowski
2016-05-20 14:02 ` Krzysztof Kozlowski [this message]
2016-05-20 14:02 ` Krzysztof Kozlowski
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