Reason for the "one dot" hang found!

[Paul Fox]

i forgot to give the link to the thread daniel refers to:
    http://lists.laptop.org/pipermail/devel/2008-June/thread.html#15432

i'm afraid there's not much to be drawn from there in the way
of conclusions, though.

paul

paul wrote:
 > daniel wrote:
 >  > On 10 June 2010 18:32, Bernie Innocenti <bernie at codewiz.org> wrote:
 >  > > It's the camera controller. Hence, the other module being loaded must be
 >  > > cafe_ccic.
 >  > >
 >  > > Looking at the initialization of cafe_ccic, there seems to be a
 >  > > complicated dance of mutexes and spin locks, plus a kernel thread and a
 >  > > bunch of sleeps. All the ingredients for a good deadlock are present :-)
 >  > 
 >  > I doubt it is directly related to locking.
 >  > If (as you say) there is no crash in the logs then I suspect it is
 >  > related to an infinite loop within the initialization code.
 >  > 
 >  > And this all seems very familiar. Google for a thread titled
 >  > "cafe_ccic/ov7670 hang on boot" from the 8.2 days.
 >  > I suspect we never fixed that bug upstream and that same commit needs
 >  > to be reverted from the new kernel.
 > 
 > good catch, good call.  commit 8815ea29a9bcbab2a3c7fbc28987cac67c2c41d0
 > is a revert for 6d77444aca298b43a88086be446f943cd0442ef7, and is present
 > in the testing branch (i.e., XO-1 802 and earlier), but not in our
 > current 2.6.31 branch.
 > 
 > paul
 > =---------------------
 >  paul fox, pgf at laptop.org
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=---------------------
 paul fox, pgf at laptop.org