diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-08-06 08:59:03 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-08-16 18:13:14 -0400 |
| commit | 3e81b59208fa4697c6c3b6eefb92892b47f8b1e7 (patch) | |
| tree | 9553dd8862a015ff91b0d26e24bc3be042552b9b /net | |
| 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 <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions