On Tue, Dec 05, 2023 at 09:55:44AM +0800, Dawei Li wrote: > On Mon, Dec 04, 2023 at 03:29:35PM +0200, Andy Shevchenko wrote: > > On Mon, Dec 04, 2023 at 03:20:09PM +0200, Ilpo Järvinen wrote: > > > On Mon, 4 Dec 2023, Dawei Li wrote: ... > > > The very same code change is already in tty-next (from another author). > > > > For your convenience: > > > > d804987153e7 ("serial: 8250_dw: Decouple DLF register check from UCV") > > [sigh] > > Apparently I thought tty/for-linus is the "bug fixing" branch for tty by > mistake, and didn't realize the same fix patch has been landed in tty-next > for a while. > > Thanks for the update. > > Anyway, I believe the fixing patch should cc stable and be getting backported? > I hit the bug on 5.10.x, it's possible the bug has been there before that. When that commit meets upstream you can always resend it for stable. The process is documented. -- With Best Regards, Andy Shevchenko