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@xxxxxx> Applied, thanks. -- AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
