linux-kernel - Re: [PATCH 2/3] OMAP: SPI: call pm_runtime

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Message-ID: <4EAE2F42.1010906@ti.com>
Date:	Mon, 31 Oct 2011 10:46:50 +0530
From:	Shubhrajyoti <shubhrajyoti@...com>
To:	Grant Likely <grant.likely@...retlab.ca>
CC:	spi-devel-general@...ts.sourceforge.net,
	"Hebbar, Gururaja" <gururaja.hebbar@...com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] OMAP: SPI: call pm_runtime_disable in error path
 and remove

On Saturday 29 October 2011 05:36 PM, Grant Likely wrote:
> On Fri, Oct 28, 2011 at 05:14:18PM +0530, Shubhrajyoti D wrote:
>> omap mcspi probe() doesnt call pm_runtime  disable functions
>> in case of failure. remove() doesnt call pm_runtime disable. This could
>> lead to warnings as below on subsequent insmod.
>>
>> ~# insmod spi-omap2-mcspi.ko
>> [  255.383671] omap2_mcspi omap2_mcspi.1: Unbalanced pm_runtime_enable!
>> ...
>>
>> This patch adds the pm_runtime disable() at appropriate stages.
>>
>> Signed-off-by: Hebbar, Gururaja<gururaja.hebbar@...com>
>> Signed-off-by: Shubhrajyoti D<shubhrajyoti@...com>
> Nitpick: please use the format "spi/<device>: ...." for the subject
> line of spi patches.  It's just a consistency thing that I like.
Henceforth I will take care
> Picked up for v3.3, thanks.
>
> g.
>
>> ---
>>   drivers/spi/spi-omap2-mcspi.c |    2 ++
>>   1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
>> index 471b0f3..6875a0b 100644
>> --- a/drivers/spi/spi-omap2-mcspi.c
>> +++ b/drivers/spi/spi-omap2-mcspi.c
>> @@ -1195,6 +1195,7 @@ static int __init omap2_mcspi_probe(struct platform_device *pdev)
>>   err4:
>>   	spi_master_put(master);
>>   err3:
>> +	pm_runtime_disable(&pdev->dev);
>>   	kfree(mcspi->dma_channels);
>>   err2:
>>   	release_mem_region(r->start, resource_size(r));
>> @@ -1216,6 +1217,7 @@ static int __exit omap2_mcspi_remove(struct platform_device *pdev)
>>   	dma_channels = mcspi->dma_channels;
>>
>>   	omap2_mcspi_disable_clocks(mcspi);
>> +	pm_runtime_disable(&pdev->dev);
>>   	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>   	release_mem_region(r->start, resource_size(r));
>>
>> -- 
>> 1.7.1
>>
>>
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