linux-kernel - Re: [PATCH] spi: qup: skip clk_disable_unprepare if the device is already runtime suspended

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Message-ID: <20160825132606.GA24683@hector.attlocal.net>
Date:   Thu, 25 Aug 2016 08:26:06 -0500
From:   Andy Gross <andy.gross@...aro.org>
To:     Sudeep Holla <sudeep.holla@....com>
Cc:     linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-soc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        David Brown <david.brown@...aro.org>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH] spi: qup: skip clk_disable_unprepare if the device is
 already runtime suspended

On Thu, Aug 25, 2016 at 01:33:28PM +0100, Sudeep Holla wrote:
> If the spi device is already runtime suspended, if spi_qup_suspend is
> executed during suspend-to-idle or suspend-to-ram it will result in the
> following splat:
> 
> WARNING: CPU: 3 PID: 1593 at drivers/clk/clk.c:476 clk_core_unprepare+0x80/0x90
> Modules linked in:
> 

<snip>

Thanks for fixing this.  I had noticed this yesterday when I was testing your
freeze patch but hadn't had time to dig in.


Tested-by: Andy Gross <andy.gross@...aro.org>