Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  i.MX31: framebuffer driver
  i.MX31: Image Processing Unit DMA and IRQ drivers
  dmaengine: add async_tx_clear_ack() macro
  dmaengine: dma_issue_pending_all == nop when CONFIG_DMA_ENGINE=n
  dmaengine: kill some dubious WARN_ONCEs
  fsldma: print correct IRQ on mpc83xx
  fsldma: check for NO_IRQ in fsl_dma_chan_remove()
  dmatest: Use custom map/unmap for destination buffer
  fsldma: use a valid 'device' for dma_pool_create
  dmaengine: fix dependency chaining

1 files changed, 2 insertions, 6 deletions

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 403dbe781122..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))
@@ -961,6 +955,8 @@ void dma_run_dependencies(struct dma_async_tx_descriptor *tx)
         if (!dep)
                 return;
 
+        /* we'll submit tx->next now, so clear the link */
+        tx->next = NULL;
         chan = dep->chan;
 
         /* keep submitting up until a channel switch is detected