linux-kernel - Re: [PATCH] staging: ft1000-pcmcia: Fix ft1000_dnld() to work also on 64bit architectures.

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Message-ID: <AANLkTikoZmbkNAw2uD-AAbNMrgyrd2kGt9APBLCioMQf@mail.gmail.com>
Date:	Wed, 23 Mar 2011 11:36:41 +0100
From:	Belisko Marek <marek.belisko@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	gregkh@...e.de, devel@...verdev.osuosl.org,
	Stano Lanci <chl.pixo@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: ft1000-pcmcia: Fix ft1000_dnld() to work also on
 64bit architectures.

On Wed, Mar 23, 2011 at 11:27 AM, Jiri Slaby <jirislaby@...il.com> wrote:
> On 03/23/2011 08:08 AM, Marek Belisko wrote:
>> From: pixo <pixo@...o-LIFEBOOK-E8310.(none)>
>>
>> Firmware file needs to be read by 4bytes also on 64 bit architectures.
>> Change long type to u32 and also extend checking. Tested on 32 and also
>> 64 bit architectures.
>>
>> Signed-off-by: Stano Lanci <chl.pixo@...il.com>
>> Signed-off-by: Marek Belisko <marek.belisko@...n-nandra.com>
>>
>> Tested-by: Stano Lanci <chl.pixo@...il.com>
>> ---
>>  drivers/staging/ft1000/ft1000-pcmcia/ft1000_dnld.c |   78 ++++++++++----------
>>  1 files changed, 39 insertions(+), 39 deletions(-)
>>
>> diff --git a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_dnld.c b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_dnld.c
>> index b0729fc..fb375ea 100644
>> --- a/drivers/staging/ft1000/ft1000-pcmcia/ft1000_dnld.c
>> +++ b/drivers/staging/ft1000/ft1000-pcmcia/ft1000_dnld.c
>> @@ -95,47 +95,47 @@ void put_request_value(struct net_device *dev, long lvalue);
>>  USHORT hdr_checksum(PPSEUDO_HDR pHdr);
>>
>>  typedef struct _DSP_FILE_HDR {
>> -     long build_date;
>> -     long dsp_coff_date;
>> -     long loader_code_address;
>> -     long loader_code_size;
>> -     long loader_code_end;
>> -     long dsp_code_address;
>> -     long dsp_code_size;
>> -     long dsp_code_end;
>> -     long reserved[8];
>> +     u32  build_date;
>> +     u32  dsp_coff_date;
>> +     u32  loader_code_address;
>> +     u32  loader_code_size;
>> +     u32  loader_code_end;
>> +     u32  dsp_code_address;
>> +     u32  dsp_code_size;
>> +     u32  dsp_code_end;
>> +     u32  reserved[8];
>>  } __attribute__ ((packed)) DSP_FILE_HDR, *PDSP_FILE_HDR;
>
> As you also changed signedness, did you check (or do you know) that the
> values cannot be negative?
No structures represent FW part and non of values could be negative.
This is bug from old implementation.
>
> Or at least the change doesn't affect code flow?
>
> regards,
> --
> js
>

regards,

marek

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