diff options
Diffstat (limited to 'crypto/async_tx/async_tx.c')
| -rw-r--r-- | crypto/async_tx/async_tx.c | 33 |
1 files changed, 22 insertions, 11 deletions
diff --git a/crypto/async_tx/async_tx.c b/crypto/async_tx/async_tx.c index 095c798d317..85eaf7b1c53 100644 --- a/crypto/async_tx/async_tx.c +++ b/crypto/async_tx/async_tx.c @@ -295,7 +295,7 @@ dma_channel_add_remove(struct dma_client *client, case DMA_RESOURCE_REMOVED: found = 0; spin_lock_irqsave(&async_tx_lock, flags); - list_for_each_entry_rcu(ref, &async_tx_master_list, node) + list_for_each_entry(ref, &async_tx_master_list, node) if (ref->chan == chan) { /* permit backing devices to go away */ dma_chan_put(ref->chan); @@ -608,23 +608,34 @@ async_trigger_callback(enum async_tx_flags flags, pr_debug("%s: (sync)\n", __func__); /* wait for any prerequisite operations */ - if (depend_tx) { - /* if ack is already set then we cannot be sure - * we are referring to the correct operation - */ - BUG_ON(async_tx_test_ack(depend_tx)); - if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR) - panic("%s: DMA_ERROR waiting for depend_tx\n", - __func__); - } + async_tx_quiesce(&depend_tx); - async_tx_sync_epilog(flags, depend_tx, cb_fn, cb_param); + async_tx_sync_epilog(cb_fn, cb_param); } return tx; } EXPORT_SYMBOL_GPL(async_trigger_callback); +/** + * async_tx_quiesce - ensure tx is complete and freeable upon return + * @tx - transaction to quiesce + */ +void async_tx_quiesce(struct dma_async_tx_descriptor **tx) +{ + if (*tx) { + /* if ack is already set then we cannot be sure + * we are referring to the correct operation + */ + BUG_ON(async_tx_test_ack(*tx)); + if (dma_wait_for_async_tx(*tx) == DMA_ERROR) + panic("DMA_ERROR waiting for transaction\n"); + async_tx_ack(*tx); + *tx = NULL; + } +} +EXPORT_SYMBOL_GPL(async_tx_quiesce); + module_init(async_tx_init); module_exit(async_tx_exit); |