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 2E62C1CEAA0; Tue, 5 Nov 2024 09:31:57 +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=1730799118; cv=none; b=WL5jFjv0qWXvnmHNQYKrdtdQBn757iPgd6tO5RLS6KDp1aFiAi0k0voeS06c9E0dVO7Iq2kgfaeSI6y+qO2xaYJke33aMwH9V1aXzVt3dDrNda0Ny0MLJZiswPrk7hT+xW9GugwM+YmHfQLA0HR+9h3NjCdd7KgUUdWFfZqOYVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730799118; c=relaxed/simple; bh=wPIGb8hV6N56iKxEiA9YRRsc4R1JZzDisefhuwIws1M=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WA1X+j8q16CWIADBVnhXSlfTUJmtDMRncwW9H01Gl87/6tww9RRU334X+a3qGGm222GVwaKsyoUEbNpZyuezH+LpAFvLkAxYMlNNp1LT2ZwhkE11kr6YZOCmuZ2pEF8b7gRx1LT1BIfSX3B1Xwwxxfr37Q6p9tqab+98qVNQb88= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Zm6ldfxw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Zm6ldfxw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 685E4C4CED0; Tue, 5 Nov 2024 09:31:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1730799117; bh=wPIGb8hV6N56iKxEiA9YRRsc4R1JZzDisefhuwIws1M=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Zm6ldfxwzvWdA9DaRFByGCE5HxEOdTjyVqD/s5bzYtAbw2MTb7z8DIthTVrdSg+CM QCge7X6VxjzgXzGtyBG7h0T/rSFYNDC6TQOJGhX3dGNlGIQYCmLPeD/ZEwVSOtnNWK j1v2sd0+zsYl+pp6TAhMmeKPhUUGk19QMeoNQjnc= Date: Tue, 5 Nov 2024 10:31:40 +0100 From: Greg KH To: Raju Rangoju Cc: linux-usb@vger.kernel.org, mathias.nyman@intel.com, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH] usb: xhci: quirk for data loss in ISOC transfers Message-ID: <2024110521-thwarting-imagines-567e@gregkh> References: <20241105091850.3094-1-Raju.Rangoju@amd.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241105091850.3094-1-Raju.Rangoju@amd.com> On Tue, Nov 05, 2024 at 02:48:50PM +0530, Raju Rangoju wrote: > During the High-Speed Isochronous Audio transfers, xHCI > controller on certain AMD platforms experiences momentary data > loss. This results in Missed Service Errors (MSE) being > generated by the xHCI. > > The root cause of the MSE is attributed to the ISOC OUT endpoint > being omitted from scheduling. This can happen either when an IN > endpoint with a 64ms service interval is pre-scheduled prior to > the ISOC OUT endpoint or when the interval of the ISOC OUT > endpoint is shorter than that of the IN endpoint. Consequently, > the OUT service is neglected when an IN endpoint with a service > interval exceeding 32ms is scheduled concurrently (every 64ms in > this scenario). > > This issue is particularly seen on certain older AMD platforms. > To mitigate this problem, it is recommended to adjust the service > interval of the IN endpoint to exceed 32ms (interval 8). This > adjustment ensures that the OUT endpoint will not be bypassed, > even if a smaller interval value is utilized. > > Cc: stable@vger.kernel.org > Signed-off-by: Raju Rangoju What commit id does this fix? Should it go to stable kernels, and if so, how far back? thanks, greg k-h