Messages in this thread | | | Date | Wed, 5 Jan 2011 16:55:51 +0000 | From | Russell King - ARM Linux <> | Subject | Re: Hit BUG_ON in dma-mapping.c:425 |
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On Wed, Jan 05, 2011 at 05:49:12PM +0100, Nicolas Ferre wrote: > Hi, > > While running mtd_stresstest on a dataflash (atmel_spi > + mtd_dataflash drivers) I hit the BUG_ON directive that > is at the beginning of ___dma_single_cpu_to_dev() function. > This function is called from the SPI driver that do a > dma_map_single() before DMA operations on the buffer > transmitted from upper layers. > > It seems that this address is above "high_memory" limit because > it is allocated by vmalloc (in mtd_stresstest.c:285)...
Well, its telling you is that you're not allowed to DMA to vmalloc addresses. Whether that's the fault of the map driver or not is a question for mtd folk.
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