From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 48FF623645D for ; Wed, 14 Oct 2026 09:52:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791971563; cv=none; b=BbWar3mmX8TDzxlYEep1PLUqmYvGiiI8ghvFC2ArabupWwZcp1NEwGh6UpqDf62jbjAcmKecXf1pwE0Gz5EF7NFGIenonyF313LaQ1qPZA96sx2J+LgJuJKdRzMJj5YJF8yQvBLfoEajDqQdqhsYwSrDZEIMZT5X4pFlY5hpiS8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791971563; c=relaxed/simple; bh=JZb9Bw5ghu8Yf+Zbw1bBNchgyX5sK/wWegSctNPcWqE=; h=Message-ID:From:Subject:To:Cc:In-Reply-To:References:Content-Type: Date; b=D3D2+zmX2DQSc04cRuateyODzXLBxvj75rBClpsHCXQGnKVhv3eL7ZHKNySHVbUe5+fr65ZLfgRXHMvBOeQNkMhvlocpI8kfQuejiU5HdVoSYvt59fcb3rRktKG8BT9mUKdaMEPAQLB8UZkPyw7kyl3oDyxXCVUzboQ9+rCpdE0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RB+zQ/dM; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RB+zQ/dM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BEEA11F00893; Wed, 14 Oct 2026 09:52:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1791971562; bh=JZb9Bw5ghu8Yf+Zbw1bBNchgyX5sK/wWegSctNPcWqE=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=RB+zQ/dMcq1WFnuIsBUJ2jmtkCyfTQvABxoK7zhaioRQKwyeeea4ybUaGzj/Zx1si zv8z1/SJ/DAF5eP3GOlrxyKonY3bqinPjqVMi+bjlzYZRTGykaRFM4kd29FVtOGffz MJM8gwPtcSB1od3uPp20ycWtT6qi5lDI6/st1OJelOeRB2wIHSjDgyMRQHi8Tplkgw sRqjmR7RjlRm8MGRuqu5fEm4z7cTYGpvNyoHy8EKkD+0+MJjJSeWHsqGPLn8NRy15t cVtwwCTowTGHPd3OSJqcsx2y1qgGy9eGDandmLmUXGSGzhE/jiS/Ns6eLomZLnOgE8 CuRAXPPmqRB1w== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH] usb: dwc2: wa for isoc packet tx fifo flush at periodic frame boundary Reply-To: sashiko-reviews@lists.linux.dev To: "Fabrice Gasnier" Cc: linux-usb@vger.kernel.org In-Reply-To: <20261014-dwc2-fix-wa-isoc-v1-1-f261ce0852bd@foss.st.com> References: <20261014-dwc2-fix-wa-isoc-v1-1-f261ce0852bd@foss.st.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Wed, 14 Oct 2026 09:52:41 +0000 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > If an isochronous packet is still being transmitted, when the end of > periodic frame interval elapses, using dma desc on dwc2 controller, > the device wrongly flushes the pending packets from the tx fifo. > This can lead to a huge packet is sent on the bus, leading to the host > finally reset the bus, and re-enumerate it. >=20 > Workaround it by tuning the periodic frame interval limit from 80% to 95%, > on the affected cores (2.70a to 4.00a). It makes the issue very unlikely > to occur. >=20 > Signed-off-by: Fabrice Gasnier Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261014-dwc2-fix-w= a-isoc-v1-1-f261ce0852bd@foss.st.com?part=3D1