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 2B939308F0B for ; Thu, 6 Nov 2025 08:35:11 +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=1762418112; cv=none; b=rs7brxQlw4HE9Z/bNVDdhKE8hy5Mxj6tljCYXxBWGLYHnfrrVzpR+hnqAcbqv+UXYeH3t488R4FkjiatdOba6hv6Yo07NoKl9rKzuCfvNUV2xZhmcEQmmKZ6muLU5+Sb0qLG508BLC2drQw2QkH5r5F3x8udvj2rh9/nTPgsvzM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762418112; c=relaxed/simple; bh=BnsNTV8xJl0ySIYnp8Q1ZIB28F7qhtRzfJB0dwiZdTg=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=BetZH0bHHQvdwDxojn2A0+cwV77EQzmBqMcgv8Z5ShPwFGfVzTRZE/bauQzN55wxQ1oOLWHTX0yfZFtOnKPiTt6iIxgF9GS/YsX212sf2U04W7rMBFFUkR3zB5u8zsHekDv1UdP+9TW4DONScRd8Y2+33coipxIOmqTrMobMp4o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=oDQpxEfO; 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="oDQpxEfO" Received: by smtp.kernel.org (Postfix) with ESMTPS id A8677C19421 for ; Thu, 6 Nov 2025 08:35:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762418111; bh=BnsNTV8xJl0ySIYnp8Q1ZIB28F7qhtRzfJB0dwiZdTg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=oDQpxEfONR/BktT0a4WuLqG9qQo3/eELmk7Vd9LrtIvwLA8LVoDeI1VfNEVmcR2sC hjYe6o3mEOBBTjL9Kh9qcu/xp8+R4tV46IIo0Fx9xalfaxJ3+yjKEDhna9UUztD8I9 JfsTBbCT2cHgFk1p3c/tORl/T326jGZuHpHYymUBo2DxQId4iARaetKVZDX5l+EnLd lkMdjhG3qcf9rs90KC/e1fiohicWP7jjRVaRGIpihWsgw/p3+1hxaSQPPs7T8X3qa9 qhcKOwtUKM6kK4bwHTGlssG5ggu1B+Z6tuEVeCgGqtSV870JX7nzWSdqmF30TOZP9n EvpSWmP8km1gQ== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id A205DC4160E; Thu, 6 Nov 2025 08:35:11 +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: Thu, 06 Nov 2025 08:35:11 +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: michal.pecio@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 #12 from Micha=C5=82 Pecio (michal.pecio@gmail.com) --- Oops, sorry for accidental post. This was meant to say that the solution to= not changing polling interval mid-stream already exists in UHCI and isn't very hard. As for bandwidth reservation, the problem could be ignored ("you are reques= ting something really weird, deal with it"). Or in case of xHCI I think it could also be solved - changing BW allocation involves similar steps as changing = the interval, so they could be done both (as long as there are no pending URBs). BTW, purely for testing purposes, I suppose one could hack the kernel to mo= dify device's descriptor and reduce polling interval. If this helps, then there would be grounds for wondering about how to implement interval switching mo= re cleanly. --=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.=