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| author | Dan Williams <dan.j.williams@intel.com> | 2009-01-19 14:39:10 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2009-01-19 14:39:10 -0700 |
| commit | 83436a0560e9ef8af2f0796264dde4bed1415359 (patch) | |
| tree | ec195673813725fbfc49c6e56689682b162f42d4 /drivers/dma | |
| parent | 169d5f663759ec494aa74a552ce99486235e6e50 (diff) | |
| download | linux-stable-83436a0560e9ef8af2f0796264dde4bed1415359.tar.gz linux-stable-83436a0560e9ef8af2f0796264dde4bed1415359.tar.bz2 linux-stable-83436a0560e9ef8af2f0796264dde4bed1415359.zip | |
dmaengine: kill some dubious WARN_ONCEs
dma_find_channel and dma_issue_pending_all are good places to warn about
improper api usage. However, warning correctly means synchronizing with
dma_list_mutex, i.e. too much overhead for these fast-path calls.
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/dmaengine.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 6df144a65fef..a58993011edb 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -329,9 +329,6 @@ struct dma_chan *dma_find_channel(enum dma_transaction_type tx_type) struct dma_chan *chan; int cpu; - WARN_ONCE(dmaengine_ref_count == 0, - "client called %s without a reference", __func__); - cpu = get_cpu(); chan = per_cpu_ptr(channel_table[tx_type], cpu)->chan; put_cpu(); @@ -348,9 +345,6 @@ void dma_issue_pending_all(void) struct dma_device *device; struct dma_chan *chan; - WARN_ONCE(dmaengine_ref_count == 0, - "client called %s without a reference", __func__); - rcu_read_lock(); list_for_each_entry_rcu(device, &dma_device_list, global_node) { if (dma_has_cap(DMA_PRIVATE, device->cap_mask)) |