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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 12:54:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 12:54:30 -0700
commitb91385236c00031c64b42b44db8068ad38a5ea11 (patch)
tree6336f60dad2f548f01125c7237fc239aed38b4fd /crypto
parentd67ae206ef05198824c2a306c0c0edf2d2088920 (diff)
parent77cd62e8082b9743b59ee1946a4c3ee2e3cd2bce (diff)
downloadconfigs-b91385236c00031c64b42b44db8068ad38a5ea11.tar.gz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx
* '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
Diffstat (limited to 'crypto')
-rw-r--r--crypto/async_tx/async_tx.c34
1 files changed, 16 insertions, 18 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c
index e8362c1efa3..dcbf1be149f 100644
--- a/crypto/async_tx/async_tx.c
+++ b/crypto/async_tx/async_tx.c
@@ -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;
-
- 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;
+ 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);
+
+ dep->tx_submit(dep);
}
chan->device->device_issue_pending(chan);