From: walter harms <wharms@bfs.de>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mattia Dongili <malattia@linux.it>,
Matthew Garrett <mjg@redhat.com>,
platform-driver-x86@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [patch] sony-laptop: fix a couple signedness bugs
Date: Thu, 07 Jun 2012 10:17:37 +0000 [thread overview]
Message-ID: <4FD07FC1.5030306@bfs.de> (raw)
In-Reply-To: <20120607095959.GB13539@mwanda>
Am 07.06.2012 11:59, schrieb Dan Carpenter:
> On Thu, Jun 07, 2012 at 11:47:30AM +0200, walter harms wrote:
>>
>>
>> Am 07.06.2012 10:22, schrieb Dan Carpenter:
>>> These need to be signed to handle negative error codes.
>>>
>>> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>>>
>>> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
>>> index 210d4ae..0a2f026 100644
>>> --- a/drivers/platform/x86/sony-laptop.c
>>> +++ b/drivers/platform/x86/sony-laptop.c
>>> @@ -2113,7 +2113,7 @@ static ssize_t sony_nc_thermal_mode_show(struct device *dev,
>>> struct device_attribute *attr, char *buffer)
>>> {
>>> ssize_t count = 0;
>>> - unsigned int mode = sony_nc_thermal_mode_get();
>>> + int mode = sony_nc_thermal_mode_get();
>>>
>>> if (mode < 0)
>>> return mode;
>>> @@ -2480,7 +2480,7 @@ static void sony_nc_backlight_ng_read_limits(int handle,
>>> props->maxlvl = 0xff;
>>>
>>> offset = sony_find_snc_handle(handle);
>>
>> sony_find_snc_handle() should return an int, did something change ?
>
> offset is a u64. It has to be 64 bit. I thought about changing it
> to s64, but decided to just cast it here instead.
>
> regards,
> dan carpenter
>
If it this function
http://lxr.free-electrons.com/source/drivers/platform/x86/sony-laptop.c?a=powerpc#L817
it just returns an index expected to be <0x10.
also offset was an int
http://lxr.free-electrons.com/source/drivers/platform/x86/sony-laptop.c?a=powerpc#L1563
it make we wonder why somebody made the change ...
never mind
re,
wh
>>
>>> - if (offset < 0)
>>> + if ((int)offset < 0)
>>> return;
>>>
>>> /* try to read the boundaries from ACPI tables, if we fail the above
>>
>>
>>
>
>
WARNING: multiple messages have this Message-ID (diff)
From: walter harms <wharms@bfs.de>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mattia Dongili <malattia@linux.it>,
Matthew Garrett <mjg@redhat.com>,
platform-driver-x86@vger.kernel.org,
kernel-janitors@vger.kernel.org
Subject: Re: [patch] sony-laptop: fix a couple signedness bugs
Date: Thu, 07 Jun 2012 12:17:37 +0200 [thread overview]
Message-ID: <4FD07FC1.5030306@bfs.de> (raw)
In-Reply-To: <20120607095959.GB13539@mwanda>
Am 07.06.2012 11:59, schrieb Dan Carpenter:
> On Thu, Jun 07, 2012 at 11:47:30AM +0200, walter harms wrote:
>>
>>
>> Am 07.06.2012 10:22, schrieb Dan Carpenter:
>>> These need to be signed to handle negative error codes.
>>>
>>> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>>>
>>> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
>>> index 210d4ae..0a2f026 100644
>>> --- a/drivers/platform/x86/sony-laptop.c
>>> +++ b/drivers/platform/x86/sony-laptop.c
>>> @@ -2113,7 +2113,7 @@ static ssize_t sony_nc_thermal_mode_show(struct device *dev,
>>> struct device_attribute *attr, char *buffer)
>>> {
>>> ssize_t count = 0;
>>> - unsigned int mode = sony_nc_thermal_mode_get();
>>> + int mode = sony_nc_thermal_mode_get();
>>>
>>> if (mode < 0)
>>> return mode;
>>> @@ -2480,7 +2480,7 @@ static void sony_nc_backlight_ng_read_limits(int handle,
>>> props->maxlvl = 0xff;
>>>
>>> offset = sony_find_snc_handle(handle);
>>
>> sony_find_snc_handle() should return an int, did something change ?
>
> offset is a u64. It has to be 64 bit. I thought about changing it
> to s64, but decided to just cast it here instead.
>
> regards,
> dan carpenter
>
If it this function
http://lxr.free-electrons.com/source/drivers/platform/x86/sony-laptop.c?a=powerpc#L817
it just returns an index expected to be <0x10.
also offset was an int
http://lxr.free-electrons.com/source/drivers/platform/x86/sony-laptop.c?a=powerpc#L1563
it make we wonder why somebody made the change ...
never mind
re,
wh
>>
>>> - if (offset < 0)
>>> + if ((int)offset < 0)
>>> return;
>>>
>>> /* try to read the boundaries from ACPI tables, if we fail the above
>>
>>
>>
>
>
next prev parent reply other threads:[~2012-06-07 10:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-07 8:22 [patch] sony-laptop: fix a couple signedness bugs Dan Carpenter
2012-06-07 8:22 ` Dan Carpenter
2012-06-07 9:47 ` walter harms
2012-06-07 9:47 ` walter harms
2012-06-07 9:59 ` Dan Carpenter
2012-06-07 9:59 ` Dan Carpenter
2012-06-07 10:17 ` walter harms [this message]
2012-06-07 10:17 ` walter harms
2012-06-07 21:42 ` Mattia Dongili
2012-06-07 21:42 ` Mattia Dongili
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