carl9170: fix noise dBm conversion
authorChristian Lamparter <chunkeey@googlemail.com>
Fri, 17 Sep 2010 20:22:50 +0000 (22:22 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 21 Sep 2010 15:05:20 +0000 (11:05 -0400)
commite278c5a90368408bd191743e7c6f978f068f4b8d
tree6900ca09d6309e2e0621e1ab7ff405f5ab959763
parent9dec6f9c48242eec742c9475f32eeef29448701c
carl9170: fix noise dBm conversion

Ever since carl9170 gained support to read the noisefloor,
the reported noisefloor level was pretty poor.

Initially I assumed that something was wrong in the PHY
setup and it would be impossible to fix without any
guidances. But this was not the case. In fact the nf
readings were correct and the thing that was broken
was the "simple" sign extension code!

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/ath/carl9170/phy.c