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| author | Geert Uytterhoeven | 2014-07-09 12:26:22 +0200 |
|---|---|---|
| committer | Mark Brown | 2014-07-16 23:41:12 +0200 |
| commit | 85912a88c1ebcad04a5cfec971771195ce8d6691 (patch) | |
| tree | c52411154cd1c2443f9c51cc43fbdd324853c6f6 /drivers/spi/spi-qup.c | |
| parent | spi: rspi: Relax DMA dependency and increase build coverage (diff) | |
| download | kernel-qcow2-linux-85912a88c1ebcad04a5cfec971771195ce8d6691.tar.gz kernel-qcow2-linux-85912a88c1ebcad04a5cfec971771195ce8d6691.tar.xz kernel-qcow2-linux-85912a88c1ebcad04a5cfec971771195ce8d6691.zip | |
spi: rspi: Handle dmaengine_prep_slave_sg() failures gracefully
As typically a shmobile SoC has less DMA channels than devices that can use
DMA, we may want to prioritize access to the DMA channels in the future.
This means that dmaengine_prep_slave_sg() may start failing arbitrarily.
Handle dmaengine_prep_slave_sg() failures gracefully by falling back to
PIO.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-qup.c')
0 files changed, 0 insertions, 0 deletions