linux-kernel - RE: [PATCH]: hpilo: fix pointer warning in ilo_ccb

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Date:	Tue, 25 May 2010 22:35:58 +0000
From:	"Camuso, Tony" <Tony.Camuso@...com>
To:	Prarit Bhargava <prarit@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...nel.org" <stable@...nel.org>,
	"Altobelli, David" <david.altobelli@...com>
Subject: RE: [PATCH]: hpilo: fix pointer warning in ilo_ccb_setup

I guess it would have helped if I asked David what the code did, first. 
":|



-----Original Message-----
From: Prarit Bhargava [mailto:prarit@...hat.com] 
Sent: Tuesday, May 25, 2010 6:10 PM
To: Andrew Morton
Cc: linux-kernel@...r.kernel.org; stable@...nel.org; Altobelli, David; Camuso, Tony
Subject: Re: [PATCH]: hpilo: fix pointer warning in ilo_ccb_setup



On 05/25/2010 05:49 PM, Andrew Morton wrote:
> On Fri, 21 May 2010 20:50:41 -0400
> Prarit Bhargava<prarit@...hat.com>  wrote:
>
>    
>> Fixes warning:
>>
>> drivers/misc/hpilo.c: In function ___ilo_ccb_setup___:
>> drivers/misc/hpilo.c:274: warning: cast to pointer from integer of different size
>>
>> Signed-off-by: Prarit Bhargava<prarit@...hat.com>
>>
>> diff --git a/drivers/misc/hpilo.c b/drivers/misc/hpilo.c
>> index 98ad012..b07a541 100644
>> --- a/drivers/misc/hpilo.c
>> +++ b/drivers/misc/hpilo.c
>> @@ -272,7 +272,7 @@ static int ilo_ccb_setup(struct ilo_hwinfo *hw, struct ccb_data *data, int slot)
>>   		return -ENOMEM;
>>
>>   	dma_va = (char *)data->dma_va;
>> -	dma_pa = (char *)data->dma_pa;
>> +	dma_pa = (char *)(&data->dma_pa);
>>
>>   	memset(dma_va, 0, data->dma_size);
>>      
> Seems very wrong - writes to *dmp_pa will now scribble over the `struct
> ccb_data'.
>
> Probably local variable dma_pa should have type dma_addr_t.
>    

Ugh ... I even passed this by a colleague at HP :/.  I'll fix it up and 
repost.

P.

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