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authorDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:17 -0700
committerDan Williams <dan.j.williams@intel.com>2009-01-06 11:38:17 -0700
commit209b84a88fe81341b4d8d465acc4a67cb7c3feb3 (patch)
tree134632ed8c914f0ee497e7a22bc616d84e068119 /drivers/dma
parent74465b4ff9ac1da503025c0a0042e023bfa6505c (diff)
dmaengine: replace dma_async_client_register with dmaengine_get
Now that clients no longer need to be notified of channel arrival dma_async_client_register can simply increment the dmaengine_ref_count. Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/dmaengine.c22
1 files changed, 6 insertions, 16 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 90aca505a1df..3f1849b7f5ef 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -600,10 +600,9 @@ static void dma_clients_notify_available(void)
}
/**
- * dma_async_client_register - register a &dma_client
- * @client: ptr to a client structure with valid 'event_callback' and 'cap_mask'
+ * dmaengine_get - register interest in dma_channels
*/
-void dma_async_client_register(struct dma_client *client)
+void dmaengine_get(void)
{
struct dma_device *device, *_d;
struct dma_chan *chan;
@@ -634,25 +633,18 @@ void dma_async_client_register(struct dma_client *client)
*/
if (dmaengine_ref_count == 1)
dma_channel_rebalance();
- list_add_tail(&client->global_node, &dma_client_list);
mutex_unlock(&dma_list_mutex);
}
-EXPORT_SYMBOL(dma_async_client_register);
+EXPORT_SYMBOL(dmaengine_get);
/**
- * dma_async_client_unregister - unregister a client and free the &dma_client
- * @client: &dma_client to free
- *
- * Force frees any allocated DMA channels, frees the &dma_client memory
+ * dmaengine_put - let dma drivers be removed when ref_count == 0
*/
-void dma_async_client_unregister(struct dma_client *client)
+void dmaengine_put(void)
{
struct dma_device *device;
struct dma_chan *chan;
- if (!client)
- return;
-
mutex_lock(&dma_list_mutex);
dmaengine_ref_count--;
BUG_ON(dmaengine_ref_count < 0);
@@ -663,11 +655,9 @@ void dma_async_client_unregister(struct dma_client *client)
list_for_each_entry(chan, &device->channels, device_node)
dma_chan_put(chan);
}
-
- list_del(&client->global_node);
mutex_unlock(&dma_list_mutex);
}
-EXPORT_SYMBOL(dma_async_client_unregister);
+EXPORT_SYMBOL(dmaengine_put);
/**
* dma_async_client_chan_request - send all available channels to the