• Christoph Hellwig's avatar
    dma-mapping: consolidate dma_supported · ee196371
    Christoph Hellwig authored
    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
    As a few architectures have much more elaborate implementations, we
    still allow for arch overrides.
    [jcmvbkbc@gmail.com: fix xtensa]
    Signed-off-by: default avatarChristoph 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: default avatarMax Filippov <jcmvbkbc@gmail.com>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
dma-mapping.h 467 Bytes