Messages in this thread | | | Date | Mon, 22 Aug 2016 23:54:14 +0100 | From | One Thousand Gnomes <> | Subject | Re: [RFC PATCH 0/3] UART slave device bus |
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On Tue, 23 Aug 2016 00:00:17 +0200 Pavel Machek <pavel@ucw.cz> wrote:
> On Mon 2016-08-22 22:32:23, One Thousand Gnomes wrote: > > > why would we even have it create a /dev/ttyX for these devices in the first place. Lets just not create an uevent for it and lets not create a dev_t for it. > > > > Because if you don't it's a regression. It's not permissible to break > > existing userspace. > > Well... it would be good to do the right thing, at least in the places > where we can. > > Yes, renumbering people's serials is bad, OTOH for new platforms it > would be nice not to expose ttyS15 which can only return -EBUSY.
That would still be a regression. Not everyone even uses the kernel bluetooth stack. It would only return EBUSY if you had done an "up" on it via the direct bluetooth stack.
Alan
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