Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/kaber/nf-next-2.6

[linux-2.6-omap-h63xx.git] / drivers / dma / dmaengine.c

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 6df144a65fef17f2c66a3cbca1fc3124af9d9a9e..280a9d263eb3c4271d1cff6e55448cae0a93b387 100644 (file)
--- 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))
@@ -524,6 +518,7 @@ struct dma_chan *__dma_request_channel(dma_cap_mask_t *mask, dma_filter_fn fn, v
                                       dma_chan_name(chan), err);
                        else
                                break;
+                       chan->private = NULL;
                        chan = NULL;
                }
        }
@@ -542,6 +537,7 @@ void dma_release_channel(struct dma_chan *chan)
        WARN_ONCE(chan->client_count != 1,
                  "chan reference count %d != 1\n", chan->client_count);
        dma_chan_put(chan);
+       chan->private = NULL;
        mutex_unlock(&dma_list_mutex);
 }
 EXPORT_SYMBOL_GPL(dma_release_channel);