From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A08A02DCF6C for ; Wed, 5 Nov 2025 08:53:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762332809; cv=none; b=i4tYvTr9o/86KQltF+0n5ZJpwSbZe6oUC+k51U1O8vmGl4VdwR/LDpvfhpyGJTbW6Wd5CH9sX23sfAVS+oAEL2yR2Y+BCG9zzWF332yDtZPRaAZaeH0H7nzx6Nzt3pIlU5T3ldNJEA0P/VwFu3c8D7MGtsAWFP+6XvhzUusigog= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762332809; c=relaxed/simple; bh=G1T930tFz8bhMss+cFHbZMsMDjVgdUFMxSwGTHGp7QQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=noQFZROSjowkzeKjGnDK0W2ppBkJ+Be12oH9tzPoKnH7olnEq+ustTgn0T0vCJ+9BPTqlIjUR5BJu9VSkQ4wbcRNnG8OJcNTJ6GZeSeexdHRps/bxcy9W0TR/netHX322T2HGUykT2z54sTKyGiP922910EXHq2L2ZHZCzImbMI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=BJRKzdsC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="BJRKzdsC" Received: by smtp.kernel.org (Postfix) with ESMTPS id 29FEAC19424 for ; Wed, 5 Nov 2025 08:53:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762332809; bh=G1T930tFz8bhMss+cFHbZMsMDjVgdUFMxSwGTHGp7QQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=BJRKzdsCWUqM6OvUqYRM46jxb1RfR2tDlBuagVGBRxDS5uUPWLBzhKe7vkzVZHkUL V0icLDSkPBYpPrc2ovENFBhjC8VPeTxHiDV8FIifO1l2s12PAB8QlfUOvLcbKtN5fD SYzvFAfVUsuJrWV0gpi2haf+DFucF4NOj2L7Lod0QbxpuHa/NvMH41Uuny4apht3W6 RNC2LvGCO4jYpnFuYDVIJZG2MD4Qc3mybo7w/NIdDX0YHzW9AM3eUTKCpej0NmS9U/ 4UjuIzJviM62tQw8MkPSsaG3Kvhcobsf7CU1dz5GODcbky3fjQikCKVnLiG190PEOU HCO0vTVWfVpxw== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 251BEC433E1; Wed, 5 Nov 2025 08:53:29 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 220748] usb: xhci_queue_isoc_tx_prepare ignore start_frame and always assumes URB_ISO_ASAP is set Date: Wed, 05 Nov 2025 08:53:28 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: nick83ola@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220748 --- Comment #3 from Nicola Lunghi (nick83ola@gmail.com) --- sorry haven't finished responding. I can try to skip directly to skip_start_over but the logic in ehci-sched seems more complicated than that and not being familiar with usb protocol I don't know how for example debug this. what could be a test setup to see the frames or record the frame that= are sent and the timing? with the ASAP scheduling if a driver try to send the frames at a specific intervals the xhci driver 'breaks' all the syncronizat= ions in the way is this implemented. the issue arised from a Motu AVB interface that expect a precise message ra= te and without it it looses the channel synchronization as it expect a specific rate for the messages. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=