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authorDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:14 -0700
committerDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:14 -0700
commit2ba05622b8b143b0c95968ba59bddfbd6d2f2559 (patch)
treeb7b72d02a993ff2ba731d6608f4ab8ce87482bcb /net/core
parentbec085134e446577a983f17f57d642a88d1af53b (diff)
dmaengine: provide a common 'issue_pending_all' implementation
async_tx and net_dma each have open-coded versions of issue_pending_all, so provide a common routine in dmaengine. The implementation needs to walk the global device list, so implement rcu to allow dma_issue_pending_all to run lockless. Clients protect themselves from channel removal events by holding a dmaengine reference. Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/dev.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 09c66a449da..e40b0d57f8f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2635,14 +2635,7 @@ out:
* There may not be any more sk_buffs coming right now, so push
* any pending DMA copies to hardware
*/
- if (!cpus_empty(net_dma.channel_mask)) {
- int chan_idx;
- for_each_cpu_mask_nr(chan_idx, net_dma.channel_mask) {
- struct dma_chan *chan = net_dma.channels[chan_idx];
- if (chan)
- dma_async_memcpy_issue_pending(chan);
- }
- }
+ dma_issue_pending_all();
#endif
return;