netdev - Re: [PATCH] staging: r8712u: Fix kernel warning for improper call of del_timer

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Message-ID: <CAJ=9CzbPmo+f4zjY4CqQ7TsUENpwy+zHcpxeLTbAH0DAZSkqsQ@mail.gmail.com>
Date:	Sun, 24 May 2015 22:03:02 +0300
From:	Haggai Eran <haggai.eran@...il.com>
To:	Larry Finger <Larry.Finger@...inger.net>
Cc:	gregkh@...uxfoundation.org, netdev@...r.kernel.org,
	devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org,
	Stable <stable@...r.kernel.org>,
	Sudip Mukherjee <sudip@...torindia.org>,
	Arek Rusniak <arek.rusi@...il.com>
Subject: Re: [PATCH] staging: r8712u: Fix kernel warning for improper call of del_timer_sync()

On 24 May 2015 at 00:16, Larry Finger <Larry.Finger@...inger.net> wrote:
> The driver is reporting a warning at kernel/time/timer.c:1096 due to calling
> del_timer_sync() while in interrupt mode. Such warnings are fixed by calling
> del_timer() instead.
>
> Signed-off-by: Larry Finger <Larry.Finger@...inger.net>
> Cc: Stable <stable@...r.kernel.org>
> Cc: Haggi Eran <haggai.eran@...il.com>

Hi,

I haven't been using kernel v4.1 so I haven't seen this warning, but looking
at the code it seems to originate from the two recent patches to remove
_cancel_timer and _cancel_timer_ex. I see that there's another patch in lkml [1]
that changes del_timer_sync back to del_timer in more places. Perhaps it
could prevent other warnings like this in the future.

Regards,
Haggai

[1] https://lkml.org/lkml/2015/5/15/226
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