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dma-mapping: consolidate dma_supported

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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.

[[email protected]: fix xtensa]
Signed-off-by: Christoph Hellwig <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Russell King <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Signed-off-by: Max Filippov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Hellwig 2015-09-09 15:39:49 -07:00 • committed by Linus Torvalds
commit ee196371d5
18 changed files with 25 additions and 98 deletions
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6
arch/ia64/include/asm/dma-mapping.h
View file

@ -27,12 +27,6 @@ extern void machvec_dma_sync_sg(struct device *, struct scatterlist *, int,
#include <asm-generic/dma-mapping-common.h>
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = platform_dma_get_ops(dev);
return ops->dma_supported(dev, mask);
}
static inline int
dma_set_mask (struct device *dev, u64 mask)
{