Messages in this thread | | | Date | Wed, 24 Oct 2012 17:08:36 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v5] dma-debug: New interfaces to debug dma mapping errors |
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On Mon, Oct 08, 2012 at 11:08:06AM -0600, Shuah Khan wrote: > Add dma-debug interface debug_dma_mapping_error() to debug drivers that fail > to check dma mapping errors on addresses returned by dma_map_single() and > dma_map_page() interfaces. This interface clears a flag set by > debug_dma_map_page() to indicate that dma_mapping_error() has been called by > the driver. When driver does unmap, debug_dma_unmap() checks the flag and if > this flag is still set, prints warning message that includes call trace that > leads up to the unmap. This interface can be called from dma_mapping_error() > routines to enable dma mapping error check debugging. > > Tested: Intel iommu and swiotlb (iommu=soft) on x86-64 with > CONFIG_DMA_API_DEBUG enabled and disabled. > > Signed-off-by: Shuah Khan <shuah.khan@hp.com>
Applied, thanks.
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