dma-mapping: consolidate dma_supported
authorChristoph Hellwig <hch@lst.de>
Wed, 9 Sep 2015 22:39:49 +0000 (15:39 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 10 Sep 2015 20:29:01 +0000 (13:29 -0700)
commitee196371d5cb1942ebdccc16bdce389812aa265e
tree59d8b00098bf929a6bb093c78e239cf265632922
parentefa21e432c7b3c8ae976039d614a017799b6e874
dma-mapping: consolidate dma_supported

Most architectures just call into ->dma_supported, but some also return 1
if the method is not present, or 0 if no dma ops are present (although
that should never happeb). Consolidate this more broad version into
common code.

Also fix h8300 which inorrectly always returned 0, which would have been
a problem if it's dma_set_mask implementation wasn't a similarly buggy
noop.

As a few architectures have much more elaborate implementations, we
still allow for arch overrides.

[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>
18 files changed:
arch/alpha/include/asm/dma-mapping.h
arch/arm/include/asm/dma-mapping.h
arch/arm64/include/asm/dma-mapping.h
arch/h8300/include/asm/dma-mapping.h
arch/hexagon/include/asm/dma-mapping.h
arch/ia64/include/asm/dma-mapping.h
arch/microblaze/include/asm/dma-mapping.h
arch/mips/include/asm/dma-mapping.h
arch/openrisc/include/asm/dma-mapping.h
arch/powerpc/include/asm/dma-mapping.h
arch/s390/include/asm/dma-mapping.h
arch/sh/include/asm/dma-mapping.h
arch/sparc/include/asm/dma-mapping.h
arch/tile/include/asm/dma-mapping.h
arch/unicore32/include/asm/dma-mapping.h
arch/x86/include/asm/dma-mapping.h
arch/xtensa/include/asm/dma-mapping.h
include/asm-generic/dma-mapping-common.h