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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2017-05-05 12:57:48 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2017-05-14 15:54:43 +0300 |
| commit | 44d5887a8bf1e86915c8ff647337cb138149da82 (patch) | |
| tree | 06c11d68ea2a2bd13fe6a88a23c5f3d62222c886 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | ab2c5f0a77fe49bdb6e307b397496373cb47d2c2 (diff) | |
| download | linux-44d5887a8bf1e86915c8ff647337cb138149da82.tar.xz | |
dmaengine: mv_xor_v2: fix tx_submit() implementation
The mv_xor_v2_tx_submit() gets the next available HW descriptor by
calling mv_xor_v2_get_desq_write_ptr(), which reads a HW register
telling the next available HW descriptor. This was working fine when HW
descriptors were issued for processing directly in tx_submit().
However, as part of the review process of the driver, a change was
requested to move the actual kick-off of HW descriptors processing to
->issue_pending(). Due to this, reading the HW register to know the next
available HW descriptor no longer works.
So instead of using this HW register, we implemented a software index
pointing to the next available HW descriptor.
Fixes: 19a340b1a820 ("dmaengine: mv_xor_v2: new driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions