linux-kernel - Re: [PATCH v2] video: mxsfb: Make sure axi clock is enabled when accessing registers

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Date:	Fri, 3 Apr 2015 11:39:27 +0800
From:	Liu Ying <liu.y.victor@...il.com>
To:	Tomi Valkeinen <tomi.valkeinen@...com>
Cc:	Liu Ying <Ying.Liu@...escale.com>, linux-fbdev@...r.kernel.org,
	Peter Chen <peter.chen@...escale.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Fabio Estevam <fabio.estevam@...escale.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	stable@...r.kernel.org
Subject: Re: [PATCH v2] video: mxsfb: Make sure axi clock is enabled when
 accessing registers

2015-03-20 19:26 GMT+08:00 Tomi Valkeinen <tomi.valkeinen@...com>:
> On 11/03/15 05:03, Liu Ying wrote:
>
>>> Why do you check for host->enabled here, but not elsewhere?
>>
>> We need this check here to make sure the axi clock reference count is no greater
>> than 1.  Looking at the context of mxsfb_set_par(), mxsfb_restore_mode() and
>
> Why is that? The clock framework handles ref counting for you. All the
> driver needs to take care of is to call as many times disable as it
> calls enable.

Okay.  I'll remove the check and send another version.

Regards,
Liu Ying

>
>  Tomi
>
>
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