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| author | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:14 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-01-06 11:38:14 -0700 |
| commit | 2ba05622b8b143b0c95968ba59bddfbd6d2f2559 (patch) | |
| tree | b7b72d02a993ff2ba731d6608f4ab8ce87482bcb /net/core/dev.c | |
| parent | bec085134e446577a983f17f57d642a88d1af53b (diff) | |
| download | lwn-2ba05622b8b143b0c95968ba59bddfbd6d2f2559.tar.gz lwn-2ba05622b8b143b0c95968ba59bddfbd6d2f2559.zip | |
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/dev.c')
| -rw-r--r-- | net/core/dev.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 09c66a449da6..e40b0d57f8ff 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; |