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| author | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 13:43:54 (GMT) |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 13:43:54 (GMT) |
| commit | b160292cc216a50fd0cd386b0bda2cd48352c73b (patch) | |
| tree | ef07cf98f91353ee4c9ec1e1ca7a2a5d9d4b538a /crypto/async_tx/async_tx.c | |
| parent | b37bde147890c8fea8369a5a4e230dabdea4ebfb (diff) | |
| parent | bbf25010f1a6b761914430f5fca081ec8c7accd1 (diff) | |
| download | linux-fsl-qoriq-b160292cc216a50fd0cd386b0bda2cd48352c73b.tar.xz | |
Merge Linux 2.6.23
Diffstat (limited to 'crypto/async_tx/async_tx.c')
| -rw-r--r-- | crypto/async_tx/async_tx.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c index 0350071..bc18cbb 100644 --- a/crypto/async_tx/async_tx.c +++ b/crypto/async_tx/async_tx.c @@ -80,6 +80,7 @@ dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) { enum dma_status status; struct dma_async_tx_descriptor *iter; + struct dma_async_tx_descriptor *parent; if (!tx) return DMA_SUCCESS; @@ -87,8 +88,15 @@ dma_wait_for_async_tx(struct dma_async_tx_descriptor *tx) /* poll through the dependency chain, return when tx is complete */ do { iter = tx; - while (iter->cookie == -EBUSY) - iter = iter->parent; + + /* find the root of the unsubmitted dependency chain */ + while (iter->cookie == -EBUSY) { + parent = iter->parent; + if (parent && parent->cookie == -EBUSY) + iter = iter->parent; + else + break; + } status = dma_sync_wait(iter->chan, iter->cookie); } while (status == DMA_IN_PROGRESS || (iter != tx)); |