From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1754741Ab3HPRiR (ORCPT <rfc822;w@1wt.eu>);
	Fri, 16 Aug 2013 13:38:17 -0400
Received: from mail-wi0-f178.google.com ([209.85.212.178]:59798 "EHLO
	mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752824Ab3HPRiN (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Fri, 16 Aug 2013 13:38:13 -0400
MIME-Version: 1.0
In-Reply-To: <20130816173000.GA8210@xanatos>
References: <71bb3fcd9f1a99aa7bd8f6dd1fb6267173db51d2.1376582695.git.d.kasatkin@samsung.com>
	<70b3564625bbda6247cc5627041344fef8a762ae.1376582695.git.d.kasatkin@samsung.com>
	<20130816001716.GA7367@kroah.com>
	<20130816172635.GA7975@xanatos>
	<20130816173000.GA8210@xanatos>
Date: Fri, 16 Aug 2013 20:38:12 +0300
Message-ID: <CACE9dm9Rw55HdwsKRYvecCFCAO137uU4iv5yLnEMzc-0pRZCsg@mail.gmail.com>
Subject: Re: [PATCH 2/2] xhci:prevent "callbacks suppressed" when debug is not enabled
From: Dmitry Kasatkin <dmitry.kasatkin@gmail.com>
To: Sarah Sharp <sarah.a.sharp@intel.com>
Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>,
        Greg KH <gregkh@linuxfoundation.org>,
        Dmitry Kasatkin <d.kasatkin@samsung.com>, linux-kernel@vger.kernel.org
Content-Type: text/plain; charset=UTF-8
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, Aug 16, 2013 at 8:30 PM, Sarah Sharp <sarah.a.sharp@intel.com> wrote:
> On Fri, Aug 16, 2013 at 10:26:35AM -0700, Sarah Sharp wrote:
>> On Thu, Aug 15, 2013 at 05:17:16PM -0700, Greg KH wrote:
>> > On Thu, Aug 15, 2013 at 07:04:55PM +0300, Dmitry Kasatkin wrote:
>> > > When debug is not enabled and dev_dbg() will expand to nothing,
>> > > log might be flooded with "callbacks suppressed". If it was not
>> > > done on purpose, better to use dev_dbg_ratelimited() instead.
>> > >
>> > > Signed-off-by: Dmitry Kasatkin <d.kasatkin@samsung.com>
>> > > ---
>> > >  drivers/usb/host/xhci-ring.c | 6 ++----
>> > >  1 file changed, 2 insertions(+), 4 deletions(-)
>> >
>> >
>> > Sarah, does this patch conflict with the trace debug patches being
>> > worked on?  I'll hold off on applying it for now, let me know if it's ok
>> > or not.
>>
>> It doesn't conflict with the trace debug patches, because those only
>> effect debugging with xhci_dbg with the host device, not dev_dbg with
>> the USB device.  This should apply fine to usb-next.
>
> At another glance, the patch removes two if blocks, but doesn't
> re-indent the rest of the lines:
>
>> @@ -3060,8 +3060,7 @@ int xhci_queue_intr_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
>>        * to set the polling interval (once the API is added).
>>        */
>>       if (xhci_interval != ep_interval) {
>> -             if (printk_ratelimit())
>> -                     dev_dbg(&urb->dev->dev, "Driver uses different interval"
>> +             dev_dbg_ratelimited(&urb->dev->dev, "Driver uses different interval"
>>                                       " (%d microframe%s) than xHCI "
>>                                       "(%d microframe%s)\n",
>>                                       ep_interval,
>
> That should probably be fixed.

It actually looks correct when patch is applied.

But it depends what you mean of course.
It looks like it was before:
dev_dbg_ratelimited(&urb->dev->dev, "Driver uses different interval"
                                       " (%d microframe%s) than xHCI "
                                       "(%d microframe%s)\n",
                                       ep_interval,
                                        ep_interval == 1 ? "" : "s",

Or may be you mean:
dev_dbg_ratelimited(&urb->dev->dev, "Driver uses different interval"
                               " (%d microframe%s) than xHCI "
                               "(%d microframe%s)\n",
                               ep_interval,
                               ep_interval == 1 ? "" : "s",

Thanks,
Dmitry

>
> Sarah Sharp