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| author | Geert Uytterhoeven <[email protected]> | 2014-08-06 14:59:03 +0200 |
|---|---|---|
| committer | Mark Brown <[email protected]> | 2014-08-16 17:13:14 -0500 |
| commit | 3e81b59208fa4697c6c3b6eefb92892b47f8b1e7 (patch) | |
| tree | 9553dd8862a015ff91b0d26e24bc3be042552b9b /tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py | |
| parent | 7d1311b93e58ed55f3a31cc8f94c4b8fe988a2b9 (diff) | |
spi: sh-msiof: Fix leaking of unused DMA descriptors
If dmaengine_prep_slave_sg() or dmaengine_submit() fail, we may leak
unused DMA descriptors.
As per Documentation/dmaengine.txt, once a DMA descriptor has been
obtained, it must be submitted. Hence:
- First prepare and submit all DMA descriptors,
- Prepare the SPI controller for DMA,
- Start DMA by calling dma_async_issue_pending(),
- Make sure to call dmaengine_terminate_all() on all descriptors that
haven't completed.
Reported-by: Laurent Pinchart <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util/lib/Perf/Trace/EventClass.py')
0 files changed, 0 insertions, 0 deletions