Re: [PATCH 00/46] Use dmaenginem_async_device_register to simplify code

[Huang Shijie]

On Fri, Aug 03, 2018 at 11:20:49AM +0300, Peter Ujfalusi wrote:
> Hi,
> 
> On 2018-08-03 10:19, Huang Shijie wrote:
> > All the patches are using dmaenginem_async_device_register to simplify code
> > except the last one:
> >   dmaengine: add COMPILE_TEST for the drivers
> > 
> > I use the last one to do the compiler test.  
> > There are still 20 drivers which do not use the 
> > dmaenginem_async_device_register.
> > Let me take a rest, if this patch set is accepted, I will do the rest.
> 
> I think for most of the drivers this series is going to open a race
> which is essentially:
> 
> prior:
> _remove()
> {
> ...
>       dma_async_device_register()
>       /* Free resources, disable HW, etc */

If these resources are managed by the devm_* APIs.
We can use the dmaenginem_async_device_register().

The Devres will release all the things in the following order:
       ................................................
        dma_async_device_unregister()
        /* Free resources, disable HW, etc */
       ................................................

    
Thanks
Huang Shijie