linux-kernel - Re: [PATCH] sound/isa/sc6000.c: add missing sc6000_setup

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Message-ID: <alpine.DEB.2.02.1204191418420.1866@hadrien>
Date:	Thu, 19 Apr 2012 14:21:59 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Takashi Iwai <tiwai@...e.de>
cc:	Jaroslav Kysela <perex@...ex.cz>, kernel-janitors@...r.kernel.org,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sound/isa/sc6000.c: add missing sc6000_setup_board

On Thu, 19 Apr 2012, Takashi Iwai wrote:

> At Thu, 19 Apr 2012 08:40:40 +0200,
> Julia Lawall wrote:
>>
>> From: Julia Lawall <Julia.Lawall@...6.fr>
>>
>> There seems to be no interaction between *port and the requested region, so
>> the clearing of *vport should take place if the request_region fails.
>>
>> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>>
>> ---
>> Not tested.  sc6000_setup_board seems rather complicated, so my reasoning
>> could be completely wrong.
>
> This setup is called first at sc6000_init_board(), which is called
> much later than these error paths.  So, I don't think the need to call
> sc6000_setup_board(*vport, 0) at err_unmap1.

Thanks for the feedback.  I guess then it is not needed on the failure 
of devm_ioport_map either.  Is it needed on the failure of 
sc6000_init_board?  That can fail either before or after the calls to 
sc6000_setup_board hav taken place.

thanks,
julia



>
>
> thanks,
>
> Takashi
>
>>
>>  sound/isa/sc6000.c |    5 +++--
>>  1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/sound/isa/sc6000.c b/sound/isa/sc6000.c
>> index d97d0f3..57679cb 100644
>> --- a/sound/isa/sc6000.c
>> +++ b/sound/isa/sc6000.c
>> @@ -594,7 +594,7 @@ static int __devinit snd_sc6000_probe(struct device *devptr, unsigned int dev)
>>  		snd_printk(KERN_ERR PFX
>>  			   "I/O port cannot be iomaped.\n");
>>  		err = -EBUSY;
>> -		goto err_unmap1;
>> +		goto err_unmap0;
>>  	}
>>
>>  	/* to make it marked as used */
>> @@ -678,9 +678,10 @@ static int __devinit snd_sc6000_probe(struct device *devptr, unsigned int dev)
>>  	return 0;
>>
>>  err_unmap2:
>> -	sc6000_setup_board(*vport, 0);
>>  	release_region(mss_port[dev], 4);
>>  err_unmap1:
>> +	sc6000_setup_board(*vport, 0);
>> +err_unmap0:
>>  	release_region(port[dev], 0x10);
>>  err_exit:
>>  	snd_card_free(card);
>>
> --
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