Re: possible regression with rs485 usage

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Sep 05, 2024 at 10:15:12AM +0200, Radisson97@web.de wrote:
> Hi, i am new to this list because i have a strange problem.
> 
> We have an embedded board based on the omap3-design with a rs485.
> With kernel 3.5 it works fine. Since 3.5 is ancient we are noe trying
> to get a new kernel up an running what is 5.8.

Any specific reason why 5.8?  That too is ancient and obsolete and not
supported by anyone.

> I turns out that the rs485 has issues (it seems a lot of ppl have
> the same issue also with other boards). We enable the rs485 via ioctl()
> and nothing seems to work. Several restarts, playing with Marcin Niestroyj's
> rs485config it suddenly works. (yes hardware is ok, works with older kernel).

So it does work?

What exact hardware and drivers are you using?

And can you try a modern and supported kernel version please?  We can't
do anything with 5.8 :(

thanks,

greg k-h