linux-kernel - sparc64 / bbc

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Message-Id: <1171978032.18442.11.camel@lax.shef.ac.uk>
Date:	Tue, 20 Feb 2007 13:27:12 +0000
From:	"J.J. Green" <j.j.green@...ffield.ac.uk>
To:	linux-kernel@...r.kernel.org
Subject: sparc64 / bbc_i2c.c

Hi all

I got bitten by this problem on sparc64 (a blade 1000)

  http://ubuntuforums.org/showthread.php?t=297474

summary :

  modprobe bbc

runs kenvctrld which uses 100% of a CPU for 5 seconds,
then 0% for 5 seconds, then 100% .. and so on. The author
cited above suggests removing the line 

  remove_wait_queue(&bp->wq, &wait);

in the function 

  static int wait_for_pin(struct bbc_i2c_bus *bp, u8 *status)

Is there a better way?

I can test patches if that would be helpful.

Cheers

Jim
-- 
J.J. Green, Dept. Applied Mathematics, Hicks Bld.,
University of Sheffield, UK.   +44 (0114) 222 3742
http://pdfb.wiredworkplace.net/pub/jjg         



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