On Wed, May 27, 2020 at 09:40:47AM +0000, Joakim Tjernlund wrote: > On Wed, 2020-05-27 at 10:38 +0200, Oliver Neukum wrote: > > CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. > > > > > > Am Dienstag, den 26.05.2020, 17:19 +0000 schrieb Joakim Tjernlund: > > > > > > This "u-boot SPL" is the first thing u-boot writes and somehow this is remembered, I assume, by cdc_acm > > > and gets echoed back when I open ttyACM0 > > > > Hi, > > > > that makes sense, but it is not something that we could really > > change in CDC-ACM, I am afraid. > > Why not? CDC-ACM should echo back anything it has received before open of ttyACM Is that in the specification somewhere? I don't think there is any requirement, otherwise that could be a huge waste of memory, right? How many bytes do you "keep" around? thanks, greg k-h
