Re: [PATCH 2/2] dma: tegra: avoid channel lock up after free

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On Mon, May 13, 2013 at 10:20:36AM -0600, Stephen Warren wrote:
> On 05/11/2013 10:30 AM, Dmitry Osipenko wrote:
> > Lock scenario: Channel 1 was allocated and prepared as slave_sg, used and freed.
> > Now preparation of cyclic dma on channel 1 will fail with err "DMA configuration
> > conflict" because tdc->isr_handler still setted to handle_once_dma_done.
> > 
> > This happens because tegra_dma_abort_all() won't be called on channel freeing
> > if pending list is empty and channel not busy. We need to clear isr_handler
> > on channel freeing to avoid locking.
> ...
> > Reposting with dma maintainers cc'd as suggested by Stephen.
> > Added Stephen's ack.
Applied, both thanks
> 
> Just for reference (not need to repost again): You'd usually send the
> messages *to* the DMA maintainers since they will be taking the patches
> through their tree, and then Ccing anyone else.
get_maintainer.pl is your friend for this

--
~Vinod
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