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authorChristoph Hellwig <hch@lst.de>2015-09-10 00:39:46 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-10 22:29:01 +0200
commitefa21e432c7b3c8ae976039d614a017799b6e874 (patch)
treefeab602cd4ff56407fd64a468ee6939b88d2141b /include/asm-generic/dma-mapping-common.h
parentdma-mapping: consolidate dma_{alloc,free}_noncoherent (diff)
downloadlinux-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 '')
-rw-r--r--include/asm-generic/dma-mapping-common.h14
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