aboutsummaryrefslogtreecommitdiff
path: root/drivers/sh
diff options
context:
space:
mode:
authorChristoph Hellwig <hch@lst.de>2017-08-27 10:35:40 +0200
committerChristoph Hellwig <hch@lst.de>2017-10-19 16:37:44 +0200
commite0c6584df9c414b50de17e1abc1099f7501bbb60 (patch)
treea683b944a85576069343932bd4fe2fa78284074a /drivers/sh
parentd708e71ed78f56330325e8de304e2fb1e38ccf1c (diff)
downloadlinux-e0c6584df9c414b50de17e1abc1099f7501bbb60.tar.gz
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.c5
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);