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authorDan Williams <dan.j.williams@intel.com>2009-12-17 13:52:39 -0700
committerDan Williams <dan.j.williams@intel.com>2009-12-17 13:52:39 -0700
commitcd78809f6191485a90ea6c92c2b58900ab5c156f (patch)
treed17a0e30178ec8ae78e04df69ca3d7b280054361 /crypto/async_tx
parent22763c5cf3690a681551162c15d34d935308c8d7 (diff)
ioat3: fix p-disabled q-continuation
When continuing a pq calculation the driver needs 3 extra sources. The driver can perform a 3 source calculation with a single descriptor, but needs an extended descriptor to process up to 8 sources in one operation. However, in the p-disabled case only one extra source is needed. When continuing a p-disabled operation there are occasions (i.e. 0 < src_cnt % 8 < 3) where the tail operation does not need an extended descriptor. Properly account for this fact otherwise invalid 'dmacount' values will be written to hardware usually causing the channel to halt with 'invalid descriptor' errors. Cc: <stable@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'crypto/async_tx')
0 files changed, 0 insertions, 0 deletions