From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f180.google.com (mail-dy1-f180.google.com [74.125.82.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2D76D1096F for ; Mon, 22 Jun 2026 05:19:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782105584; cv=none; b=MxuXlryIUdPRQcBZzUyuN6ZNY/WnYiyytZVUd37DYKAcTuNrPyGP0nKPEJvCFDW8V1pwvK/MsU6jj5ATVa9WtGsZacMUaQ8uqqCL8ebb3QX/j1McSuQk+WUQETk7qgk7pIkQL0fDjFM3RNxLc0eUar9JCvEUzH8nNtevUNxqhmY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782105584; c=relaxed/simple; bh=C/HL6GgTuQ1x/2FnOwctbqk3Gzl+9Azc71OikTb1rPM=; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc: Message-Id:References:To; b=oH35kODnZhAGBvygMiz5tl1r+rVecPf9CPqse0MjfkcSDH232KTq7Ae8mXxQlVCIcWsqoDlXEdg4xFqMWT3yF7Fzu3W4bgx0UpUvvUO3Pb7tm8TajUItzBPH74YTHArGAv6CsFkmYRBXfMcvix8DtpV04uAoSD4dPxWpk7R1STw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AwUqvbSd; arc=none smtp.client-ip=74.125.82.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AwUqvbSd" Received: by mail-dy1-f180.google.com with SMTP id 5a478bee46e88-30c23abc62eso1562967eec.1 for ; Sun, 21 Jun 2026 22:19:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1782105582; x=1782710382; darn=vger.kernel.org; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=QZeOMuSexwyWmR1jQzZ0pfBD0YRbwHTAcdxldOuFVq8=; b=AwUqvbSdFt7I+nH9iLXj9N51gzuiRed/+7vMzeIXjAqaBaBTa4MjHqzak4FXSQX9mG iKrjQgY0tPPBYR+tmXoA8DTqVkGQy6GWodyNo+8PvzNWqm9XsUZ/FJODhM3s20WWeLtA 2EJ+/N5nEdzGvgcO1VsAGC1tyISajthGjEYr374fdINR0SKKDScdSuXWFHeaF0Q0VAS3 6nfYAWKRnCPPn5CvK0/EynZdZaWenZUvFdYxN3pnL5rXGLfVIZ8W3nv3dSUqm8zsTOZw 0kczfGt7PMaNPiM5YQFQioh87AETUQtRMqVi3MZQJkXAgIlBdXTNRhq9KqxhB/oZ+Iip f7bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782105582; x=1782710382; h=to:references:message-id:content-transfer-encoding:cc:date :in-reply-to:from:subject:mime-version:x-gm-gg:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=QZeOMuSexwyWmR1jQzZ0pfBD0YRbwHTAcdxldOuFVq8=; b=qsAIxK/JuCzfmHNt4m2TKxcsLHOgl5GbibdLoaTcb2hIyZ936JrEMiyK+WCsNbPnhh GifmktG/4C81+blF6E1cgtmVFVhKc62f9TdR6+Jbp/03cmKhFe3vioxcDWCRzwZcyLId 2EWjWChzpZDF6znEgJgS7dVnhWQVYEC4ijvtUmaTWm+i4DKH8qvGKeV+bPPTkc4lkYqC NxjNSb71FmOn5k+Fzu5ufYQW+u/peJehfp3yjnsfKrE1bc7hwcPAlXE3UIp77cYV3ev5 OLtdcQPqTQ055cqqFNZ86aq5M0krVor5eLGWjjb3NZxO1VjSiFsCoz/DRaWOLtT6aOLr L0Yg== X-Gm-Message-State: AOJu0YzP33nGcNOP+8xQw8CRPKLX4vb4hSCgc8ccOK73WCKXECyHIXnR b++xYmbQ4fvEEdb38wlTYKLYo6g98sOE7Jq8egmZyyBbfEMcO/W9i5Vc3sOCYA== X-Gm-Gg: AfdE7ckGCMFNDMv+HIqcRKMIEu2eOIXUMImpeKDIG3cEoJztx6Ug2Tu6nwJ4WgGqAfS 6M566g7hDucOz92kzytvtcnTFhRPoRTsA06+TZVjZxm8UJCxU8/HzHywCbLW1EVpvJkD5g90g3k AVK5ujtcRkpev4k0ihuBtiFyhW6FrRv/poxB2LXJm7c9jAZUEgzTPf2RYhwTyrnLVnFvA1gqibB umQisD9Ro1xNb/Rg7+s1ZbjIqVIRz0bAZH/jvwuzUTLD0hXN07fuJv19fQU9H014ozraNeo1CFl rnJ//QbZ4vM7VqucbVAfwMzusujoAS/LaJngneSHtz8jB2oQ9Sn/lItIvzBXTr/80QQN0+HrE1k 0sYtCF0mr+GZ6G5fqEPQY4qQP00EqrIK98Hjn5ZNZ85ygXtDoHa8nbAwExw8R5YZSVBteyUngmx 59kmsMdolQQPIwopbGxkvLhCi/lsGb3wzkqQ3Mhu8i X-Received: by 2002:a05:7301:10c6:b0:307:e4fa:894b with SMTP id 5a478bee46e88-30c06ff40bemr8738044eec.8.1782105582105; Sun, 21 Jun 2026 22:19:42 -0700 (PDT) Received: from smtpclient.apple ([2607:fb90:8e0a:2041:e8ce:c3f6:cac8:c8ba]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30c1ba635d8sm9891389eec.10.2026.06.21.22.19.41 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 21 Jun 2026 22:19:41 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3826.700.81.1.4\)) Subject: Re: [PATCH] USB: EHCI: inflate max_tt_usecs and implement sitd backpointers From: Brent Page In-Reply-To: Date: Sun, 21 Jun 2026 22:19:27 -0700 Cc: linux-usb@vger.kernel.org, Michal Pecio Content-Transfer-Encoding: quoted-printable Message-Id: References: <35666FD0-D108-41FD-8CE4-CD8F0DD87472@gmail.com> To: Alan Stern X-Mailer: Apple Mail (2.3826.700.81.1.4) > I'm not sure what point in the code you're talking about. =20 I've been talking about line 2086 list_add(&sitd->sitd_list, &iso_sched->td_list); and lines 2177-2179 sitd =3D list_entry(sched->td_list.next, struct ehci_sitd, sitd_list); list_move_tail(&sitd->sitd_list, &stream->td_list); in the v7.1 kernel. > Also, you don't seem to have noticed that iso_sched is different from > stream. Yes, I did mix these up. The new patch (v3 soon) is better (no bug when = crossing urb boundaries). From, Brent Page