diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-09-10 00:39:46 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-10 22:29:01 +0200 |
| commit | efa21e432c7b3c8ae976039d614a017799b6e874 (patch) | |
| tree | feab602cd4ff56407fd64a468ee6939b88d2141b /include/asm-generic | |
| parent | dma-mapping: consolidate dma_{alloc,free}_noncoherent (diff) | |
| download | linux-efa21e432c7b3c8ae976039d614a017799b6e874.tar.xz linux-efa21e432c7b3c8ae976039d614a017799b6e874.zip | |
dma-mapping: cosolidate dma_mapping_error
Currently there are three valid implementations of dma_mapping_error:
(1) call ->mapping_error
(2) check for a hardcoded error code
(3) always return 0
This patch provides a common implementation that calls ->mapping_error
if present, then checks for DMA_ERROR_CODE if defined or otherwise
returns 0.
[jcmvbkbc@gmail.com: fix xtensa]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/dma-mapping-common.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index ec321dd98f93..cdaa24193d4c 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -313,4 +313,18 @@ static inline void dma_free_noncoherent(struct device *dev, size_t size, dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs); } +static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) +{ + debug_dma_mapping_error(dev, dma_addr); + + if (get_dma_ops(dev)->mapping_error) + return get_dma_ops(dev)->mapping_error(dev, dma_addr); + +#ifdef DMA_ERROR_CODE + return dma_addr == DMA_ERROR_CODE; +#else + return 0; +#endif +} + #endif |