On Tue, Aug 17, 2021 at 09:23:24AM +0530, Viresh Kumar wrote: > On 16-08-21, 10:45, Michael S. Tsirkin wrote: > > On Mon, Aug 16, 2021 at 03:17:23PM +0530, Viresh Kumar wrote: > > > The I2C protocol allows zero-length requests with no data, like the > > > SMBus Quick command, where the command is inferred based on the > > > read/write flag itself. > > > > So I wonder. What if we allow zero-length buffers in virtio? Would that > > address the need? > > There are three things this patch does, all of which are important > IMO: > > 1. Drop the need of passing both write and read buffers, as that isn't > required really since we already have another way of linking > different transfers using the fail-next flag. > > 2. Make the buffer optional, for zero-length transfers. > > 3. Pass the r/w flag separately, which is kind of relevant because of > 2 (zero-length transfers) only. > > > I think (1) can be done separately anyway, and we may be able to solve > (2) and (3) if we allow zero-length buffers in virtio itself.
OK, so yea. Let's split this up please. > -- > viresh --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
