Hi,

On Sun, Sep 16, 2012 at 01:22:01AM +0000, Paul Walmsley wrote:

On Wed, 12 Sep 2012, Felipe Balbi wrote:

quoted

On Tue, Sep 11, 2012 at 10:02:48PM +0000, Paul Walmsley wrote:

quoted

The bad news is that N800 no longer boots -- or the UART dies during 
serial init:

http://www.pwsan.com/omap/testlogs/test_tty_next_e36851d0/20120910020323/boot/2420n800/2420n800_log.txt

The problem doesn't seem to affect the 2430SDP.

Could you put together a patch to fix N800?

Bisected this down.  It's this one that causes the problem on N800:

commit 93220dcc3052182e7156c09655ad1316055564b9
Author: Felipe Balbi [off-list ref]
Date:   Thu Sep 6 15:45:27 2012 +0300

    serial: omap: set dev->drvdata before enabling pm_runtime
    
    by the time we call our first pm_runtme_get_sync()
    after enable pm_runtime, our resume method might
    be called. To avoid problems, we must make sure
    that our dev->drvdata is set correctly before
    our resume method gets called.
    
    Tested-by: Shubhrajyoti D [off-list ref]
    Acked-by: Santosh Shilimkar [off-list ref]
    Signed-off-by: Felipe Balbi [off-list ref]
    Signed-off-by: Greg Kroah-Hartman [off-list ref]

Interesting. That simply moves platform_set_drvdata() to a saner
location... The only way for this to cause problems is if we're trying
to restore a context which was never saved.

Is there a way to prevent runtime_resume() to be called during probe()
if I know the HW is already enabled ? Maybe with
pm_runtime_set_active() ?

-- 
balbi