From: Ezequiel Garcia Date: Mon, 12 Aug 2013 17:14:56 +0000 (-0300) Subject: mtd: nand: pxa3xx: Make dma code dependent on dma capable platforms X-Git-Tag: v3.12-rc1~82^2~40 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4db2e3a3315019c419a7ee8ebaf5d8b361be791;p=pandora-kernel.git mtd: nand: pxa3xx: Make dma code dependent on dma capable platforms This patch adds a macro ARCH_HAS_DMA to compile-out arch specific dma code, namely pxa_request_dma() and pxa_free_dma(). These symbols are available only in pxa, which makes impossible to build the driver in other platforms than ARCH_PXA. In order to handle non-dma capable platforms, we implement a fallbacks that allocate buffers as if 'use_dma=false', putting the dma related code under the ARCH_HAS_DMA conditional. Please note that the correct way to handle this is to migrate the dma code to use of the mmp_pdma dmaengine driver. However, currently this is not possible because the two dmaengine drivers can't work together. Signed-off-by: Ezequiel Garcia Tested-by: Daniel Mack Signed-off-by: Brian Norris Signed-off-by: David Woodhouse --- Reading git-diff-tree failed