On Tue, 2017-04-25 at 21:12 +0300, Andy Shevchenko wrote: > On Tue, 2017-04-25 at 15:16 +0000, Eugeniy Paltsev wrote: > > On Mon, 2017-04-24 at 19:56 +0300, Andy Shevchenko wrote: > > > On Mon, 2017-04-24 at 15:55 +0000, Eugeniy Paltsev wrote: > > > Descriptor is active until terminate_all() is called or new > > > descriptor > > > is supplied. So, the caller has a quite time to check on it. > > > > > > So, what's wrong on it by your opinion? > > > > Hmm, this looks OK. (In my example (hsu/hsu.c driver) error > > descriptors > > are not freed even after terminate_all is called) > > If it's active it will be freed. > Otherwise caller should check somewhere that descriptor fails. > > But actually this is fragile and we need to monitor failed > descriptors. > Thanks for reporting. > > > > > > Of course, if you want to keep by some reason (should be stated > > > what > > > the reason in comment) erred descriptors, you can do that. > > > > So, I'll create desc_error list and store failed descriptors in this > > list until terminate_all() is called. > > Is it OK implementation? > > Nope, we need to amend virt-chan API for that. I'm on it. Will send a > series soon. I have to correct what I wrote before. We have two options: a) one I proposed above; b) move descriptor to complete list and call complete callback with result. So, it looks like the b) variant is what is done already in 4 (did I calculate correctly?) drivers and respective users. -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe dmaengine" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
