linux-kernel - Re: [PATCH] drivers/rtc/interface.c: check the validation of rtc_time in __rtc_read

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Message-ID: <20141121021039.GB8368@lge.com>
Date:	Fri, 21 Nov 2014 11:10:39 +0900
From:	Hyogi Gim <ciogenis@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	a.zummo@...ertech.it, john.stultz@...aro.org,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/rtc/interface.c: check the validation of
 rtc_time in __rtc_read_time

On Tue, Oct 14, 2014 at 03:21:31PM -0700, Andrew Morton wrote:
> On Wed, 8 Oct 2014 11:05:29 +0900 Hyogi Gim <ciogenis@...il.com> wrote:
> 
> > Some of rtc devices always return '0' when rtc_class_ops.read_time is called.
> > So if rtc_time isn't verified in callback, rtc interface cannot know whether
> > rtc_time is valid.
> 
> We should fix the buggy .read_time() implementations...
> 

Thanks for comments.
I'm studying rtc framework and trying to find a problem.
This is a minor bug. But, as you know, it can be a big problem for
newbies like me.

Even though it was late, I send you reply because a question.
If this patch is merged, rtc_valid_tm() in rtc_class_ops.read_time
callback is not necessary anymore.
So, I think each rtc device driver should change the code.
I can change the code. But, test is a little different.

In this case, how can I progress this modification?
Can I just send the notification for rtc_valid_tm() to the driver
manufacturer? or, request test for the code that I've modified?

-- 
Hyogi

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