Here are some patches to teach the cppi41 DMA driver support for
suspend and resume. Patches 1-3 are simply cosmetic things that emerged
during my debugging sessions.
Patch #4 is actually a real bugfix which I would like Sebastian
Andrzej Siewior to have a look at. Quite frankly, the allocation scheme
in this driver and the logic to determine a descriptor's index number
seems quite complicated to me, but that's probably a different story.
Allocating and freeing the exact same pointer more than once is
certainly a bug.
Patch #5 adds support for suspend and resume. As the commit log says,
the code needed to achive this is the result of a trial-and-error
session. This is the minimum that's I'm left with now and which works
for me.
On a different note, I'm also working on patches for the musb core to
make it suspend and resume. Currently, I still have to rmmod/insmod
musb_dsps before/after the resume cycle, but I'm hoping to make
progress here soon.
Thanks,
Daniel
v1 -> v2:
* Patch #5: depend on CONFIG_PM_SLEEP rather than on
CONFIG_PM and use SIMPLE_DEV_PM_OPS
(Reported by Sergei Shtylyov)
Daniel Mack (5):
dma: cppi41: pass around device instead of platform_device
dma: cppi41: s/deinit_cpii41/deinit_cppi41/
dma: cppi41: add shortcut to &pdev->dev in cppi41_dma_probe()
dma: cppi41: only allocate descriptor memory once
dma: cppi41: add support for suspend and resume
drivers/dma/cppi41.c | 120 ++++++++++++++++++++++++++++++++-------------------
1 file changed, 75 insertions(+), 45 deletions(-)
--
1.8.3.1
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