[PATCH v4 00/21] OMAP UART Patches

[Paul Walmsley]

On Wed, 12 Sep 2012, Felipe Balbi wrote:

> On Tue, Sep 11, 2012 at 10:02:48PM +0000, Paul Walmsley wrote:
> 
> > 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 <balbi at ti.com>
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 <shubhrajyoti at ti.com>
    Acked-by: Santosh Shilimkar <santosh.shilimkar at ti.com>
    Signed-off-by: Felipe Balbi <balbi at ti.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>

- Paul