iwlwifi: include rssi as part of decision making for reduce txpower

Hello,

A bug[0] was reported against Ubuntu that reports a kernel panic when using the hotkey to disable then re-enable wifi on a Dell XPS 14z. A kernel bisect was performed, which indicated the following commit as the source of the regression:

commit dd551ab7b47ace14753b0d73f79437cc35adcf6b

Author: Wey-Yi Guy <[email protected]>
Date:   Thu May 3 14:22:01 2012 -0700

iwlwifi: include rssi as part of decision making for reduce txpower

In bt coex, consider the average rssi as part of decision making
process

Reviewed-on: http://git-mwg.jer.intel.com/gerrit/1945

A test kernel was created with this commit reverted, which stopped the kernel panic from occurring.

A bugzilla bug[1] has been opened.

Thanks,

Joe

[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1029547
[1] https://bugzilla.kernel.org/show_bug.cgi?id=45491
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This is a duplicate of https://bugzilla.kernel.org/show_bug.cgi?id=45481
which I've already commented on with the correct fix. I've also sent the fix to stable:

http://www.mail-archive.com/[email protected]/msg12286.html

Thanks,
johannes

Great! Thanks for the feedback, Johannes.