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author | Herbert Xu <herbert@gondor.apana.org.au> | 2010-05-26 11:36:58 +1000 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2010-05-26 11:36:58 +1000 |
commit | 50d1e9302bab7d35dae7146f8c468e0943015616 (patch) | |
tree | fa05320f4a297bd582686574cf94ba444e264b3f /crypto/async_tx/async_tx.c | |
parent | 7cc2835083aedfde42de02301005a5555e00c4b1 (diff) | |
parent | dc4ccfd15d4fc7a91ddf222bc5eed5cc4bcf10e6 (diff) | |
download | op-kernel-dev-50d1e9302bab7d35dae7146f8c468e0943015616.zip op-kernel-dev-50d1e9302bab7d35dae7146f8c468e0943015616.tar.gz |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/crypto-2.6
Diffstat (limited to 'crypto/async_tx/async_tx.c')
-rw-r--r-- | crypto/async_tx/async_tx.c | 46 |
1 files changed, 19 insertions, 27 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c index f9cdf04..7f2c00a 100644 --- a/crypto/async_tx/async_tx.c +++ b/crypto/async_tx/async_tx.c @@ -81,18 +81,13 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx, struct dma_device *device = chan->device; struct dma_async_tx_descriptor *intr_tx = (void *) ~0; - #ifdef CONFIG_ASYNC_TX_DISABLE_CHANNEL_SWITCH - BUG(); - #endif - /* first check to see if we can still append to depend_tx */ - spin_lock_bh(&depend_tx->lock); - if (depend_tx->parent && depend_tx->chan == tx->chan) { - tx->parent = depend_tx; - depend_tx->next = tx; + txd_lock(depend_tx); + if (txd_parent(depend_tx) && depend_tx->chan == tx->chan) { + txd_chain(depend_tx, tx); intr_tx = NULL; } - spin_unlock_bh(&depend_tx->lock); + txd_unlock(depend_tx); /* attached dependency, flush the parent channel */ if (!intr_tx) { @@ -111,24 +106,22 @@ async_tx_channel_switch(struct dma_async_tx_descriptor *depend_tx, if (intr_tx) { intr_tx->callback = NULL; intr_tx->callback_param = NULL; - tx->parent = intr_tx; - /* safe to set ->next outside the lock since we know we are + /* safe to chain outside the lock since we know we are * not submitted yet */ - intr_tx->next = tx; + txd_chain(intr_tx, tx); /* check if we need to append */ - spin_lock_bh(&depend_tx->lock); - if (depend_tx->parent) { - intr_tx->parent = depend_tx; - depend_tx->next = intr_tx; + txd_lock(depend_tx); + if (txd_parent(depend_tx)) { + txd_chain(depend_tx, intr_tx); async_tx_ack(intr_tx); intr_tx = NULL; } - spin_unlock_bh(&depend_tx->lock); + txd_unlock(depend_tx); if (intr_tx) { - intr_tx->parent = NULL; + txd_clear_parent(intr_tx); intr_tx->tx_submit(intr_tx); async_tx_ack(intr_tx); } @@ -176,21 +169,20 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx, * 2/ dependencies are 1:1 i.e. two transactions can * not depend on the same parent */ - BUG_ON(async_tx_test_ack(depend_tx) || depend_tx->next || - tx->parent); + BUG_ON(async_tx_test_ack(depend_tx) || txd_next(depend_tx) || + txd_parent(tx)); /* the lock prevents async_tx_run_dependencies from missing * the setting of ->next when ->parent != NULL */ - spin_lock_bh(&depend_tx->lock); - if (depend_tx->parent) { + txd_lock(depend_tx); + if (txd_parent(depend_tx)) { /* we have a parent so we can not submit directly * if we are staying on the same channel: append * else: channel switch */ if (depend_tx->chan == chan) { - tx->parent = depend_tx; - depend_tx->next = tx; + txd_chain(depend_tx, tx); s = ASYNC_TX_SUBMITTED; } else s = ASYNC_TX_CHANNEL_SWITCH; @@ -203,7 +195,7 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx, else s = ASYNC_TX_CHANNEL_SWITCH; } - spin_unlock_bh(&depend_tx->lock); + txd_unlock(depend_tx); switch (s) { case ASYNC_TX_SUBMITTED: @@ -212,12 +204,12 @@ async_tx_submit(struct dma_chan *chan, struct dma_async_tx_descriptor *tx, async_tx_channel_switch(depend_tx, tx); break; case ASYNC_TX_DIRECT_SUBMIT: - tx->parent = NULL; + txd_clear_parent(tx); tx->tx_submit(tx); break; } } else { - tx->parent = NULL; + txd_clear_parent(tx); tx->tx_submit(tx); } |