[PATCH] tty: serial: samsung_tty: loopback mode support

[Greg Kroah-Hartman]

On Mon, Jun 27, 2022 at 12:23:53PM +0900, Chanho Park wrote:
> Internal loopback mode can be supported by setting
> S3C2443_UCON_LOOPBACK bit. The mode & bit can be supported since
> s3c2410 and later SoCs. We can test it by linux-serial-test program[1]
> with -k option. It will set TIOCM_LOOP mode during test.
> 
> -k, --loopback     Use internal hardware loop back

I do not understand this line in the changelog text, what is it for?

> 
> [1]: https://github.com/cbrake/linux-serial-test
> Signed-off-by: Chanho Park <chanho61.park at samsung.com>

Our tools require a blank line before the signed-off-by line.  Did you
not get a warning when checking this patch before sending it out?

Also, no need for a footnote in a changelog that is so short, just put
the link in the body of the text itself.

thanks,

greg k-h