diff options
| author |   Christoph Hellwig <hch@lst.de> | 2019-02-13 08:01:27 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-02-18 22:41:04 +1100 |
| commit | feee96440c9c5fdf47f8c8079c104fc8082924a0 (patch) | |
| tree | 6b61e0feb55fa765389c3c5909ec81015fda966e /kernel/dma/swiotlb.c | |
| parent | powerpc/dma: remove dma_nommu_dma_supported (diff) | |
| download | linux-dev-feee96440c9c5fdf47f8c8079c104fc8082924a0.tar.xz linux-dev-feee96440c9c5fdf47f8c8079c104fc8082924a0.zip | |
swiotlb: remove swiotlb_dma_supported
The only user left is powerpc, but even there the generic dma-direct
version works just as well, given that we guarantee that the swiotlb
buffer must always be addressable.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'kernel/dma/swiotlb.c')
| -rw-r--r-- | kernel/dma/swiotlb.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index d6361776dc5c..cbf3498a46f9 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -648,15 +648,3 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr, return true; } - -/* - * Return whether the given device DMA address mask can be supported - * properly. For example, if your device can only drive the low 24-bits - * during bus mastering, then you would pass 0x00ffffff as the mask to - * this function. - */ -int -swiotlb_dma_supported(struct device *hwdev, u64 mask) -{ - return __phys_to_dma(hwdev, io_tlb_end - 1) <= mask; -} |