On 11/12/2015 07:41 PM, Andy Shevchenko wrote: > On Thu, Nov 12, 2015 at 10:22 PM, Peter Hurley <peter@xxxxxxxxxxxxxxxxxx> wrote: >> On 11/12/2015 02:57 PM, One Thousand Gnomes wrote: > >> An illustrative (kernel-space) example is the mess that is dmaengine_pause(). >> Some DMA implementations provide the means to stop and restart DMA without >> losing data and some DMA implementations do not. Unfortunately, some >> advertise they support dmaengine_pause() but only for lossy uses like audio. >> Because the api hides this, the query interface for pause support is >> useless. > > The DMA pause() call means only pause with possibility to resume. > There is a resume() call as well. Any driver which treats pause() as a > complete stop is buggy driver and should be fixed. How about pause _without_ the possibility to resume? https://groups.google.com/d/msg/linux.kernel/Abe0hfGcgsw/H0se55wC558J -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
