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| author | Dan Williams <dan.j.williams@intel.com> | 2008-07-17 17:59:55 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2008-07-17 17:59:55 -0700 |
| commit | 4af1fc66eb19dadf73950d7b903a3886bc41f7b4 (patch) | |
| tree | bab1445b45a548604e68b30f75d0fc4bde21a7a7 /crypto/cipher.c | |
| parent | 7672bf08f2fc86033d160c63be2fff0998869481 (diff) | |
| download | linux-crypto-4af1fc66eb19dadf73950d7b903a3886bc41f7b4.tar.gz linux-crypto-4af1fc66eb19dadf73950d7b903a3886bc41f7b4.zip | |
async_tx: fix handling of the "out of descriptor" condition in async_xor
Ensure forward progress is made when a dmaengine driver is unable to
allocate an xor descriptor by breaking the dependency chain with
async_tx_quisce() and issue any pending descriptors.
Tested with iop-adma by setting device->max_xor = 2 to force multiple
calls to device_prep_dma_xor for each call to async_xor and limiting the
descriptor slot pool to 5. Discovered that the minimum descriptor pool
size for iop-adma is 2 * iop_chan_xor_slot_cnt(device->max_xor) + 1.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto/cipher.c')
0 files changed, 0 insertions, 0 deletions