From: Ian Abbott <abbotti@mev.co.uk>
To: Hartley Sweeten <HartleyS@visionengravers.com>,
Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devel@driverdev.osuosl.org" <devel@driverdev.osuosl.org>
Subject: Re: [PATCH] staging: comedi: das1800: remove unused variable
Date: Wed, 6 Apr 2016 11:40:56 +0100 [thread overview]
Message-ID: <5704E7B8.6000707@mev.co.uk> (raw)
In-Reply-To: <5704D9AD.4050807@mev.co.uk>
On 06/04/16 10:41, Ian Abbott wrote:
> On 06/04/16 02:21, Hartley Sweeten wrote:
>> On Tuesday, April 05, 2016 7:23 AM, Sudip Mukherjee wrote:
>>> The variable unipolar was never used.
>>>
>>> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
>>> ---
>>>
>>> There may be a chance that reading from DAS1800_CONTROL_C is necessary
>>> before reading from DAS1800_STATUS. If that is true then please discard
>>> this patch.
>>
>> Actually the driver has a bug here.
>>
>> The analog input samples should be munged if the inputs are
>> configured for
>> bipolar mode.
>>
>> I have a series almost ready that cleans up this driver and fixes the
>> bug.
>
> Hi Hartley, can the bug fix be placed at the top of your patch series?
> Thanks.
>
The bug has been there forever (even in the "out-of-tree" version from
comedi.org, where I have just fixed it). There have been patches applied
to reformat and remove the incorrect bits of code, including
a142785d7c9d ("Staging: comedi: das1800: fixed multiple brace coding
style issues and pointer declaration style errors") and 82d28561b7e0
("staging: comedi: Remove if condition."). The latter patch,
82d28561b7e0, mainly served to hide the bug further!
--
-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@mev.co.uk> )=-
-=( Web: http://www.mev.co.uk/ )=-
next prev parent reply other threads:[~2016-04-06 10:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-05 14:23 [PATCH] staging: comedi: das1800: remove unused variable Sudip Mukherjee
2016-04-06 1:21 ` Hartley Sweeten
2016-04-06 9:41 ` Ian Abbott
2016-04-06 10:40 ` Ian Abbott [this message]
2016-04-06 17:55 ` Hartley Sweeten
2016-04-06 16:19 ` Hartley Sweeten
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