From: Charles Keepax <ckeepax@opensource.cirrus.com>
To: Colin King <colin.king@canonical.com>
Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
Robert Jarzmik <robert.jarzmik@free.fr>,
Mark Brown <broonie@kernel.org>,
"Mauro Carvalho Chehab" <mchehab+samsung@kernel.org>,
<patches@opensource.cirrus.com>, <linux-input@vger.kernel.org>,
<kernel-janitors@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Input: wm97xx: only unregister wm97xx_driver if it has been registered
Date: Wed, 5 Sep 2018 10:16:09 +0100 [thread overview]
Message-ID: <20180905091609.GC1653@imbe.wolfsonmicro.main> (raw)
In-Reply-To: <20180904183505.10693-1-colin.king@canonical.com>
On Tue, Sep 04, 2018 at 07:35:05PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> In the case where IS_BUILTIN(CONFIG_AC97_BUS)) is not true, the
> wm97xx_driver driver is being unregistered even it has not been
> previously registered. Fix this by only unregistering it if
> IS_BUILTIN(CONFIG_AC97_BUS)) is true. This fixes the warning
> message:
>
> [ 834.111248] ------------[ cut here ]------------
> [ 834.111248] Unexpected driver unregister!
> [ 834.111319] WARNING: CPU: 2 PID: 11749 at drivers/base/driver.c:193 driver_unregister+0x3b/0x40
> [ 834.111319] Modules linked in: wm97xx_ts(-) ....
>
> ..and a stack trace.
>
> To easily reproduce this, load and unload the module on a system where
> the hardware is not supported.
>
> Fixes: ae9d1b5fbd7b ("Input: wm97xx: add new AC97 bus support")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Thanks,
Charles
next prev parent reply other threads:[~2018-09-05 9:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 18:35 [PATCH] Input: wm97xx: only unregister wm97xx_driver if it has been registered Colin King
2018-09-05 9:16 ` Charles Keepax [this message]
2018-09-09 19:08 ` Robert Jarzmik
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