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| author | Christoph Hellwig <hch@lst.de> | 2017-08-27 10:35:40 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-10-19 16:37:44 +0200 |
| commit | e0c6584df9c414b50de17e1abc1099f7501bbb60 (patch) | |
| tree | a683b944a85576069343932bd4fe2fa78284074a /drivers/sh | |
| parent | d708e71ed78f56330325e8de304e2fb1e38ccf1c (diff) | |
| download | linux-stable-e0c6584df9c414b50de17e1abc1099f7501bbb60.tar.gz linux-stable-e0c6584df9c414b50de17e1abc1099f7501bbb60.tar.bz2 linux-stable-e0c6584df9c414b50de17e1abc1099f7501bbb60.zip | |
sh: make dma_cache_sync a no-op
sh does not implement DMA_ATTR_NON_CONSISTENT allocations, so it doesn't
make any sense to do any work in dma_cache_sync given that it
must be a no-op when dma_alloc_attrs returns coherent memory.
On the other hand sh uses dma_cache_sync internally in the dma_ops
implementation and for the maple bus that does not use the DMA API,
so a the old functionality for dma_cache_sync is still provided under
the name sh_sync_dma_for_device, and without the redundant dev
argument. While at it two of the syncing dma_ops also go the proper
_for_device postfix.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'drivers/sh')
| -rw-r--r-- | drivers/sh/maple/maple.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/sh/maple/maple.c b/drivers/sh/maple/maple.c index bec81c2404f7..7525039d812c 100644 --- a/drivers/sh/maple/maple.c +++ b/drivers/sh/maple/maple.c @@ -300,7 +300,7 @@ static void maple_send(void) mutex_unlock(&maple_wlist_lock); if (maple_packets > 0) { for (i = 0; i < (1 << MAPLE_DMA_PAGES); i++) - dma_cache_sync(0, maple_sendbuf + i * PAGE_SIZE, + sh_sync_dma_for_device(maple_sendbuf + i * PAGE_SIZE, PAGE_SIZE, DMA_BIDIRECTIONAL); } @@ -642,8 +642,7 @@ static void maple_dma_handler(struct work_struct *work) list_for_each_entry_safe(mq, nmq, &maple_sentq, list) { mdev = mq->dev; recvbuf = mq->recvbuf->buf; - dma_cache_sync(&mdev->dev, recvbuf, 0x400, - DMA_FROM_DEVICE); + sh_sync_dma_for_device(recvbuf, 0x400, DMA_FROM_DEVICE); code = recvbuf[0]; kfree(mq->sendbuf); list_del_init(&mq->list); |