[v6] powerpc/pseries: Limit EPOW reset event warnings

[Michael Ellerman]

On Tue, 2015-01-12 at 11:13:42 UTC, Vipin K Parashar wrote:
> Kernel prints respective warnings about various EPOW events for
> user information/action after parsing EPOW interrupts. At times
> below EPOW reset event warning is seen to be flooding kernel log
> over a period of time.
> 
> May 25 03:46:34 alp kernel: Non critical power or cooling issue cleared
> May 25 03:46:52 alp kernel: Non critical power or cooling issue cleared
> May 25 03:53:48 alp kernel: Non critical power or cooling issue cleared
> May 25 03:55:46 alp kernel: Non critical power or cooling issue cleared
> May 25 03:56:34 alp kernel: Non critical power or cooling issue cleared
> May 25 03:59:04 alp kernel: Non critical power or cooling issue cleared
> May 25 04:02:01 alp kernel: Non critical power or cooling issue cleared
> 
> These EPOW reset events are spurious in nature and are triggered by
> firmware without an actual EPOW event being reset. This patch avoids these
> multiple EPOW reset warnings by using a counter variable. This variable
> is incremented every time an EPOW event is reported. Upon receiving a EPOW
> reset event the same variable is checked to filter out spurious events and
> decremented accordingly.
> 
> This patch also improves log messages to better describe EPOW event being
> reported. Merged adjacent log messages into single one to reduce number of
> lines printed per event.
> 
> Signed-off-by: Kamalesh Babulal <kamalesh at linux.vnet.ibm.com>
> Signed-off-by: Vipin K Parashar <vipin at linux.vnet.ibm.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/b4af279a7cba5cc1f665485e

cheers