Tearing down DMA transfer setup after DMA client has finished

On Wed, Dec 07, 2016 at 04:45:58PM +0000, M?ns Rullg?rd wrote:

Vinod Koul [off-list ref] writes:

quoted

On Tue, Dec 06, 2016 at 01:14:20PM +0000, M?ns Rullg?rd wrote:

quoted

That's not going to work very well.  Device drivers typically request
dma channels in their probe functions or when the device is opened.
This means that reserving one of the few channels there will inevitably
make some other device fail to operate.

No that doesnt make sense at all, you should get a channel only when you
want to use it and not in probe!

Tell that to just about every single driver ever written.

Not really, few do yes which is wrong but not _all_ do that.

-- 
~Vinod