From: robin.murphy@arm•com (Robin Murphy)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v4 3/6] iommu: add ARM short descriptor page table allocator.
Date: Fri, 9 Oct 2015 18:41:51 +0100 [thread overview]
Message-ID: <5617FC5F.60505@arm.com> (raw)
In-Reply-To: <20151009155750.GS26278@arm.com>
On 09/10/15 16:57, Will Deacon wrote:
> On Tue, Sep 22, 2015 at 03:12:47PM +0100, Yong Wu wrote:
>> I would like to show you a problem I met, The recursion here may
>> lead to stack overflow while we test FHD video decode.
>>
>> From the log, I get the internal variable in the error case: the
>> "size" is 0x100000, the "iova" is 0xfea00000, but at that time the
>> "blk_size" is 0x1000 as it was the map of small-page. so it enter the
>> recursion here.
>>
>> After check the unmap flow, there is only a iommu_unmap in
>> __iommu_dma_unmap, and it won't check the physical address align in
>> iommu_unmap.
>
> That sounds like a bug in __iommu_dma_unmap. Robin?
Isn't it just cf27ec930be9 again wearing different trousers? All I do is
call iommu_unmap with the same total size that was mapped originally.
Robin.
next prev parent reply other threads:[~2015-10-09 17:41 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-03 10:21 [PATCH v4 0/6] MT8173 IOMMU SUPPORT Yong Wu
2015-08-03 10:21 ` [PATCH v4 1/6] dt-bindings: iommu: Add binding for mediatek IOMMU Yong Wu
2015-08-03 10:21 ` [PATCH v4 2/6] dt-bindings: mediatek: Add smi dts binding Yong Wu
2015-08-03 10:21 ` [PATCH v4 3/6] iommu: add ARM short descriptor page table allocator Yong Wu
2015-09-16 15:58 ` Will Deacon
2015-09-17 14:54 ` Yong Wu
2015-09-22 14:12 ` Yong Wu
2015-10-09 15:57 ` Will Deacon
2015-10-09 17:41 ` Robin Murphy [this message]
2015-10-09 18:19 ` Will Deacon
2015-10-21 10:34 ` Yong Wu
2015-08-03 10:21 ` [PATCH v4 4/6] memory: mediatek: Add SMI driver Yong Wu
2015-08-11 14:56 ` Joerg Roedel
2015-08-12 12:39 ` Yong Wu
2015-08-03 10:21 ` [PATCH v4 5/6] iommu/mediatek: Add mt8173 IOMMU driver Yong Wu
2015-08-11 15:39 ` Joerg Roedel
2015-08-12 12:28 ` Yong Wu
2015-09-11 15:33 ` Robin Murphy
2015-09-15 5:53 ` Yong Wu
2015-08-03 10:21 ` [PATCH v4 6/6] dts: mt8173: Add iommu/smi nodes for mt8173 Yong Wu
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