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Bug#784146: linux-image-3.16.0-4-armmp-lpae: Spurious RTC error messages on OpenBlocks AX3-4



Control: tag -1 fixed-upstream patch

On Sun, 2015-05-17 at 15:24 +0100, Ian Campbell wrote:
> On Sun, 2015-05-03 at 15:21 +0100, Ben Hutchings wrote:
> > Package: src:linux
> > Version: 3.16.7-ckt9-3~deb8u1
> > Severity: normal
> > Tags: upstream
> > 
> > On the OpenBlocks AX3-4, the kernel logs these messages at every boot:
> > 
> > [    1.853325] rtc-mv d0010300.rtc: internal RTC not ticking
> > [    1.863449] /build/linux-vwVRbb/linux-3.16.7-ckt9/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> > 
> > The internal RTC is not expected to work on this model so it should
> > be disabled in the Device Tree:
> > <http://thread.gmane.org/gmane.linux.kernel.stable/131173>.  That
> > will fix the first error message.
> 
> Looks like this has now hit mainline as
> http://git.kernel.org/linus/750e30d4076ae5e02ad13a376e96c95a2627742c
> 
> It's tagged for stable v3.8+ so unless you want it sooner (in which case
> I can arrange a cherry-pick) I plan to wait for it to hit 3.16.y.

I don't mind.

> > The second message also seems inappropriate in cases where no RTC
> > device exists.  Also the path prefix isn't helpful.
> 
> Agreed on both counts.

These are also fixed upstream:

commit aed98b9a1be6fcf1685dfd37f0a3e78e92a21f7d
Author: Floris Bos <bos@je-eigen-domein.nl>
Date:   Thu Apr 16 12:45:12 2015 -0700

    rtc: hctosys: do not treat lack of RTC device as error

commit 521fca18e828cddc94535a1ea5ac33460f1de679
Author: Aaro Koskinen <aaro.koskinen@iki.fi>
Date:   Thu Apr 16 12:45:54 2015 -0700

    rtc: hctosys: use function name in the error log

Ben.

-- 
Ben Hutchings
compatible: Gracefully accepts erroneous data from any source

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