[lm-sensors] [RFC/PATCH] hwmon: fix common race conditions, batch 1, v2

[Darrick J. Wong]

On Thu, Mar 20, 2008 at 09:32:38AM -0400, Mark M. Hoffman wrote:
> Hi all:
> 
>  adm1026.c |   22 ++++++++++++++--------
>  adm1029.c |   30 +++++++++++++++++++-----------
>  adm1031.c |   20 +++++++++++++++-----
>  adm9240.c |   20 ++++++++++++++------
>  adt7470.c |   40 ++++++++++++++++++++++++----------------
>  adt7473.c |   54 +++++++++++++++++++++++++++++++-----------------------
>  asb100.c  |   16 ++++++++++++----
>  7 files changed, 129 insertions(+), 73 deletions(-)
> 
> commit 3c798b55145f42725c54d64ac7d69062a5d62bad
> Author: Mark M. Hoffman <mhoffman at lightlink.com>
> Date:   Mon Mar 3 23:35:52 2008 -0500
> 
>     hwmon: fix common race conditions, batch 1
>     
>     Most hwmon drivers have one or more race conditions that could cause the driver
>     to display incorrect data; in the absolute worst case, these races could allow
>     divide-by-zero/OOPS.  The most common of these involves a race between setting
>     a fan divider and displaying the fan data (RPMs).  This patch fixes these race
>     conditions by taking the update lock (or equivalent) as necessary.
>     
>     Signed-off-by: Mark M. Hoffman <mhoffman at lightlink.com>

The adt7470/7473 bits compile and survive simple testing, so
Acked-by: Darrick J. Wong <djwong at us.ibm.com>

--D