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031e912741
It's not allowed to create an alias of system RAM for DMA. So the memory used must not be allocated using dma_alloc_coherent but has to be reserved before using memblock routines. There is no need to memzero the buffer because dma_alloc_coherent zeros the memory for us. LAKML-Reference: 1299271882-2130-4-git-send-email-u.kleine-koenig@pengutronix.de Tested-by: Philippe Retornaz <philippe.retornaz@epfl.ch> Acked-by: Philippe Retornaz <philippe.retornaz@epfl.ch> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>