El jue, 3 nov 2022 a las 1:04, Luis Chamberlain (<mcgrof@xxxxxxxxxx>) escribió: > > On Wed, Nov 02, 2022 at 02:14:24PM +0100, Guillermo Rodriguez Garcia wrote: > > I understand that device drivers should implement ->write_iter if they > > need to be written from kernel space, but evdev does not support this. > > What is the recommended way to have a layered device driver that can > > talk to evdev ? > > Shouldn't just writing write_iter support make this work? If I understand correctly, supporting both write and write_iter is not allowed [1]: "If a file has both the regular ->read/->write methods and the iter variants those could have different semantics for messed up enough drivers. Also fails the kernel access to them in that case." [1]: https://lore.kernel.org/all/20200817073212.830069-3-hch@xxxxxx/ Thanks, Guillermo Rodriguez Garcia guille.rodriguez@xxxxxxxxx
