From 50f5c08b016bb4c6d34667d7ab9d5ee35e85261f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 21 May 2017 12:49:22 +0200 Subject: xtensa: remove DMA_ERROR_CODE xtensa already implements the mapping_error method for its only dma_map_ops instance. Signed-off-by: Christoph Hellwig --- arch/xtensa/include/asm/dma-mapping.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch/xtensa') diff --git a/arch/xtensa/include/asm/dma-mapping.h b/arch/xtensa/include/asm/dma-mapping.h index c6140fa8c0be..269738dc9d1d 100644 --- a/arch/xtensa/include/asm/dma-mapping.h +++ b/arch/xtensa/include/asm/dma-mapping.h @@ -16,8 +16,6 @@ #include #include -#define DMA_ERROR_CODE (~(dma_addr_t)0x0) - extern const struct dma_map_ops xtensa_dma_map_ops; static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) -- cgit From 07c75d7a6b9eae24ab72c6eb2fbd39963775b0bf Mon Sep 17 00:00:00 2001 From: Vladimir Murzin Date: Wed, 28 Jun 2017 10:16:57 +0100 Subject: drivers: dma-mapping: allow dma_common_mmap() for NOMMU Currently, internals of dma_common_mmap() is compiled out if build is done for either NOMMU or target which explicitly says it does not have/want coherent DMA mmap. It turned out that dma_common_mmap() can be handy in NOMMU setup (at least for ARM). This patch converts exitent NOMMU targets to use ARCH_NO_COHERENT_DMA_MMAP, thus when CONFIG_MMU is gone from dma_common_mmap() their behaviour stays unchanged. ARM is not converted to ARCH_NO_COHERENT_DMA_MMAP because it 1) already has mmap callback which can handle (at some extent) NOMMU 2) already defines dummy pgprot_noncached() for NOMMU build. c6x and frv stay untouched since they already have ARCH_NO_COHERENT_DMA_MMAP. Cc: Steven Miao Cc: Geert Uytterhoeven Cc: Michal Simek Cc: Yoshinori Sato Cc: Rich Felker Cc: Chris Zankel Cc: Max Filippov Suggested-by: Christoph Hellwig Signed-off-by: Vladimir Murzin Tested-by: Benjamin Gaignard --- arch/xtensa/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/xtensa') diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index f4126cf997a4..7ad6d77b2f22 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -3,6 +3,7 @@ config ZONE_DMA config XTENSA def_bool y + select ARCH_NO_COHERENT_DMA_MMAP if !MMU select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_IPC_PARSE_VERSION select BUILDTIME_EXTABLE_SORT -- cgit