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| author | Dan Williams <dan.j.williams@intel.com> | 2008-04-17 20:17:26 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2008-04-17 13:25:54 -0700 |
| commit | 636bdeaa1243327501edfd2a597ed7443eb4239a (patch) | |
| tree | 59b894f124e3664ea4a537d7c07c527abdb9c8da /crypto/async_tx/async_xor.c | |
| parent | c4fe15541d0ef5cc8cc1ce43057663851f8fc387 (diff) | |
| download | blackbird-op-linux-636bdeaa1243327501edfd2a597ed7443eb4239a.tar.gz blackbird-op-linux-636bdeaa1243327501edfd2a597ed7443eb4239a.zip | |
dmaengine: ack to flags: make use of the unused bits in the 'ack' field
'ack' is currently a simple integer that flags whether or not a client is done
touching fields in the given descriptor. It is effectively just a single bit
of information. Converting this to a flags parameter allows the other bits to
be put to use to control completion actions, like dma-unmap, and capture
results, like xor-zero-sum == 0.
Changes are one of:
1/ convert all open-coded ->ack manipulations to use async_tx_ack
and async_tx_test_ack.
2/ set the ack bit at prep time where possible
3/ make drivers store the flags at prep time
4/ add flags to the device_prep_dma_interrupt prototype
Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto/async_tx/async_xor.c')
| -rw-r--r-- | crypto/async_tx/async_xor.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c index 1c445c7bdab7..3a0dddca5a10 100644 --- a/crypto/async_tx/async_xor.c +++ b/crypto/async_tx/async_xor.c @@ -191,7 +191,7 @@ async_xor(struct page *dest, struct page **src_list, unsigned int offset, /* if ack is already set then we cannot be sure * we are referring to the correct operation */ - BUG_ON(depend_tx->ack); + BUG_ON(async_tx_test_ack(depend_tx)); if (dma_wait_for_async_tx(depend_tx) == DMA_ERROR) panic("%s: DMA_ERROR waiting for " |
