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authorChristoph Hellwig <hch@lst.de>2020-06-29 16:03:57 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2020-06-30 16:44:03 +0300
commit91d5b70273267bbae6f5d1fb4cf3510bd31ef9ff (patch)
tree9996f407555352be8720dc5773552e813f509a19 /net/xdp
parent3aa91625007807bfca4155df1867a5c924a08662 (diff)
downloadlinux-91d5b70273267bbae6f5d1fb4cf3510bd31ef9ff.tar.xz
xsk: Replace the cheap_dma flag with a dma_need_sync flag
Invert the polarity and better name the flag so that the use case is properly documented. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200629130359.2690853-3-hch@lst.de
Diffstat (limited to 'net/xdp')
-rw-r--r--net/xdp/xsk_buff_pool.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 540ed75e4482..9fe84c797a70 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -55,7 +55,6 @@ struct xsk_buff_pool *xp_create(struct page **pages, u32 nr_pages, u32 chunks,
pool->free_heads_cnt = chunks;
pool->headroom = headroom;
pool->chunk_size = chunk_size;
- pool->cheap_dma = true;
pool->unaligned = unaligned;
pool->frame_len = chunk_size - headroom - XDP_PACKET_HEADROOM;
INIT_LIST_HEAD(&pool->free_list);
@@ -195,7 +194,7 @@ int xp_dma_map(struct xsk_buff_pool *pool, struct device *dev,
xp_check_dma_contiguity(pool);
pool->dev = dev;
- pool->cheap_dma = xp_check_cheap_dma(pool);
+ pool->dma_need_sync = !xp_check_cheap_dma(pool);
return 0;
}
EXPORT_SYMBOL(xp_dma_map);
@@ -280,7 +279,7 @@ struct xdp_buff *xp_alloc(struct xsk_buff_pool *pool)
xskb->xdp.data = xskb->xdp.data_hard_start + XDP_PACKET_HEADROOM;
xskb->xdp.data_meta = xskb->xdp.data;
- if (!pool->cheap_dma) {
+ if (pool->dma_need_sync) {
dma_sync_single_range_for_device(pool->dev, xskb->dma, 0,
pool->frame_len,
DMA_BIDIRECTIONAL);