From: m.szyprowski@samsung•com (Marek Szyprowski)
To: linux-arm-kernel@lists•infradead.org
Subject: [v4 0/4] ARM: dma-mapping: IOMMU atomic allocation
Date: Tue, 28 Aug 2012 18:51:00 +0200 [thread overview]
Message-ID: <503CF6F4.7060702@samsung.com> (raw)
In-Reply-To: <1346130784-23571-1-git-send-email-hdoyu@nvidia.com>
Hello,
On 8/28/2012 7:13 AM, Hiroshi Doyu wrote:
> The commit e9da6e9 "ARM: dma-mapping: remove custom consistent dma
> region" breaks the compatibility with existing drivers. This causes
> the following kernel oops(*1). That driver has called dma_pool_alloc()
> to allocate memory from the interrupt context, and it hits
> BUG_ON(in_interrpt()) in "get_vm_area_caller()". This patch seris
> fixes this problem with making use of the pre-allocate atomic memory
> pool which DMA is using in the same way as DMA does now.
>
> Any comment would be really appreciated.
Looks fine now. I will do some tests and apply them to my fixes-for-3.6
branch. Thanks for Your contribution!
Best regards
--
Marek Szyprowski
Samsung Poland R&D Center
prev parent reply other threads:[~2012-08-28 16:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-28 5:13 [v4 0/4] ARM: dma-mapping: IOMMU atomic allocation Hiroshi Doyu
2012-08-28 5:13 ` [v4 1/4] ARM: dma-mapping: atomic_pool with struct page **pages Hiroshi Doyu
2012-08-28 5:13 ` [v4 2/4] ARM: dma-mapping: Refactor out to introduce __in_atomic_pool Hiroshi Doyu
2012-08-28 5:13 ` [v4 3/4] ARM: dma-mapping: Introduce __atomic_get_pages() for __iommu_get_pages() Hiroshi Doyu
2012-08-28 5:13 ` [v4 4/4] ARM: dma-mapping: IOMMU allocates pages from atomic_pool with GFP_ATOMIC Hiroshi Doyu
2012-08-28 16:51 ` Marek Szyprowski [this message]
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