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Tue, 20 Oct 2026 13:15:31 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 7227HnNp12pjcAAAD6G6ig (envelope-from ); Tue, 20 Oct 2026 13:15:31 +0000 Date: Tue, 20 Oct 2026 15:15:31 +0200 Message-ID: <8733u0h5sc.wl-tiwai@suse.de> From: Takashi Iwai To: linux-sound@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH] ALSA: emux: Skip events until fully initialized In-Reply-To: <20261016161953.482441-1-tiwai@suse.de> References: <20261016161953.482441-1-tiwai@suse.de> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spamd-Result: default: False [-3.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.997]; MIME_GOOD(-0.10)[text/plain]; RCPT_COUNT_TWO(0.00)[2]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,imap1.dmz-prg2.suse.org:helo] X-Spam-Score: -3.30 X-Spam-Level: X-Spam-Flag: NO On Fri, 16 Oct 2026 18:19:52 +0200, Takashi Iwai wrote: > > The emux synth creates a sequencer port and then continues > initializing the port attributes. It allows the port receiving > already input events even though the synth stuff hasn't been fully > initialized. Similarly, upon the releasing, it clears up the voices, > etc, then detaches the port. This may leave some pending voices > before the detaching. > > For addressing such races, introduce a simple guard to skip the event > processing in the premature or teardown phases. > > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") > Reported-by: Sashiko > Cc: > Signed-off-by: Takashi Iwai This doesn't look covering the issue enough, and I created a different fix for emux synth, so let's scratch this one. Takashi