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

Browse source 
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx:
  fsldma: allow Freescale Elo DMA driver to be compiled as a module
  fsldma: remove internal self-test from Freescale Elo DMA driver
  drivers/dma/dmatest.c: switch a GFP_ATOMIC to GFP_KERNEL
  dmatest: properly handle duplicate DMA channels
  drivers/dma/ioat_dma.c: drop code after return
  async_tx: make async_tx_run_dependencies() easier to read
This commit is contained in:
Linus Torvalds 2008-10-20 12:54:30 -07:00
commit b91385236c
6 changed files with 116 additions and 208 deletions
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32
crypto/async_tx/async_tx.c
View file

@ -115,34 +115,32 @@ EXPORT_SYMBOL_GPL(dma_wait_for_async_tx);
* (start) dependent operations on their target channel
* @tx: transaction with dependencies
*/
void
async_tx_run_dependencies(struct dma_async_tx_descriptor *tx)
void async_tx_run_dependencies(struct dma_async_tx_descriptor *tx)
{
struct dma_async_tx_descriptor *next = tx->next;
struct dma_async_tx_descriptor *dep = tx->next;
struct dma_async_tx_descriptor *dep_next;
struct dma_chan *chan;
if (!next)
if (!dep)
return;
tx->next = NULL;
chan = next->chan;
chan = dep->chan;
/* keep submitting up until a channel switch is detected
* in that case we will be called again as a result of
* processing the interrupt from async_tx_channel_switch
*/
while (next && next->chan == chan) {
struct dma_async_tx_descriptor *_next;
for (; dep; dep = dep_next) {
spin_lock_bh(&dep->lock);
dep->parent = NULL;
dep_next = dep->next;
if (dep_next && dep_next->chan == chan)
dep->next = NULL; /* ->next will be submitted */
else
dep_next = NULL; /* submit current dep and terminate */
spin_unlock_bh(&dep->lock);
spin_lock_bh(&next->lock);
next->parent = NULL;
_next = next->next;
if (_next && _next->chan == chan)
next->next = NULL;
spin_unlock_bh(&next->lock);
next->tx_submit(next);
next = _next;
dep->tx_submit(dep);
}
chan->device->device_issue_pending(chan);