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Fri, 25 Sep 2026 07:49:31 -0700 (PDT) Date: Fri, 25 Sep 2026 16:49:28 +0200 From: Petr Mladek To: John Ogness Cc: Sergey Senozhatsky , Steven Rostedt , Marcos Paulo de Souza , Samuel Thibault , Greg Kroah-Hartman , Jiri Slaby , Ilpo =?iso-8859-1?Q?J=E4rvinen?= , Hugo Villeneuve , Fushuai Wang , Kees Cook , Stepan Ionichev , linux-serial@vger.kernel.org, Manuel Lauss , linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/2] braille: nbcon: Allow using a serial driver converted to nbcon API as a Braille console Message-ID: References: <20260922072558.98854-1-pmladek@suse.com> <87ik3tiim7.fsf@jogness.linutronix.de> <87a4p5iejg.fsf@jogness.linutronix.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87a4p5iejg.fsf@jogness.linutronix.de> On Fri 2026-09-25 16:42:19, John Ogness wrote: > On 2026-09-25, Petr Mladek wrote: > > This shows that braille_write() is called form printk() even when > > braille_co is not in console_list. It is called via vt_console_print() > > because the graphical console driver (ttyX) is registered. > > But isn't that a bug? I thought Braille consoles were not supposed to be > handled by printk(). Even in this new series you added that exact > comment. I believe that it is not a bug. I understand it the way that the Braille device should show everything that is shown on the virtual terminal. It should show the printk() messages when they are printed there by the related console driver. It is just that printk() is only one source of messages shown on the terminal. The vt code maintains what is displayed. Best Regards, Petr