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Mon, 26 Oct 2026 08:03:18 +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 UFdGFEYJ32odHQAAD6G6ig (envelope-from ); Mon, 26 Oct 2026 08:03:18 +0000 Date: Mon, 26 Oct 2026 09:03:18 +0100 Message-ID: <87v76o6g8p.wl-tiwai@suse.de> From: Takashi Iwai To: Denis Kulikov Cc: Takashi Iwai , Jaroslav Kysela , linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] ALSA: usb-audio: Rate-limit URB submission error at stream start In-Reply-To: <20261025231849.148149-1-dar1knessx@gmail.com> References: <20261025231849.148149-1-dar1knessx@gmail.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 X-Mailing-List: linux-kernel@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 [-12.51 / 50.00]; SUSE_INTERNAL_BYPASS(-9.00)[]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_TO(0.00)[gmail.com]; ARC_NA(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; RCVD_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:97:from,2a07:de40:b281:106:10:150:64:167:received]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:dkim,imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -12.51 X-Spam-Level: X-Rspamd-Queue-Id: C53FF1F7B8 On Mon, 26 Oct 2026 00:18:49 +0100, Denis Kulikov wrote: > > When two USB audio devices share a USB 2.0 hub (here a headset and a > microphone), there may not be enough isochronous bandwidth to start the > second stream, and usb_submit_urb() fails with -ENOSPC. PipeWire keeps > retrying to start the stream every ~20 ms, and every attempt logs > > usb 2-1.1: cannot submit urb 0, error -28: not enough bandwidth > > On my desktop this was printed up to 94 times per second and flooded > the kernel log. > > Use usb_audio_err_ratelimited() for this message, as commit > 2db2be5607c4 ("ALSA: usb-audio: Rate limit usb_set_interface error > reporting") already did for a neighbouring message in the same file. > > Tested on that desktop (X79, Linux 7.3) with the headset and the > microphone on one hub, starting playback and capture on both for 20 > seconds: the stock snd-usb-audio module printed the message 580 times, > the patched one printed it 50 times and suppressed the rest. > > Signed-off-by: Denis Kulikov Applied now. Thanks. Takashi