linux-kernel - Re: [PATCH 4/4 v4] rtc: add rtc-driver for HID sensors of type time

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Date:	Fri, 14 Dec 2012 14:08:36 +0100
From:	Alexander Holler <holler@...oftware.de>
To:	Lars-Peter Clausen <lars@...afoo.de>
CC:	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	Jonathan Cameron <jic23@....ac.uk>, rtc-linux@...glegroups.com,
	Alessandro Zummo <a.zummo@...ertech.it>,
	srinivas pandruvada <srinivas.pandruvada@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 4/4 v4] rtc: add rtc-driver for HID sensors of type time

Am 14.12.2012 10:42, schrieb Lars-Peter Clausen:
> On 12/12/2012 12:11 PM, Alexander Holler wrote:
>> This driver makes the time from HID sensors (hubs) which are offering
>> such available like any other RTC does.
>>
>> Currently the time can only be read. Setting the time must be done
>> through sending a report, which currently isn't supported by
>> hid-sensor-hub. (I've planned to submit patches.)
>>
>> It is necessary that all values like year, month etc, are send as
>> 8bit values (1 byte each) and all of them in 1 report. Also the
>> spec HUTRR39b doesn't define the range of the year field, we
>> tread it as 0 - 99 because that's what most RTCs I know about are
>> offering.
>>
>> Signed-off-by: Alexander Holler <holler@...oftware.de>
>
> Hi,
>
> sorry for the delay. There is still the __devinit in front of
> hid_time_remove left.
>
> And another thing I've overlooked before:
> wait_for_completion_interruptible_timeout can either return a positive
> number when the completion was completed, 0 in case of an timeout, or a
> negative error code in case it was interrupted. You need to handle all
> three. E.g. something like this.
>
> ret = wait_for_completion_interruptible_timeout(...)
> if (ret == 0)
> 	return -EIO;
> if (ret < 0)
> 	return ret
>

Hmpf, the only working approach to use some in kernel functions really 
is to the read source yourself and don't trust anything else. :/

And that ping-ping is stressing my patience, I think I will write a rfc 
to introduce (at least allow) maintainer-patches.

Will make a v5.

Regards,

Alexander
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