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authorStanislaw Gruszka <sgruszka@redhat.com>2012-10-25 09:51:39 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-17 13:14:20 -0800
commit4a7dfa5ea7f7a4736ba9425cbd343d0eb18f521f (patch)
tree08af6099539a759380d93c0e204950e644e310c8
parenta699cd395b19aa262fbffcbe79aec1c57238e489 (diff)
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rt2800: validate step value for temperature compensation
commit bf7e1abe434ba9e22e8dc04a4cba4ab504b788b8 upstream. Some hardware has correct (!= 0xff) value of tssi_bounds[4] in the EEPROM, but step is equal to 0xff. This results on ridiculous delta calculations and completely broke TX power settings. Reported-and-tested-by: Pavel Lucik <pavel.lucik@gmail.com> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/net/wireless/rt2x00/rt2800lib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index e6e174c..d44ce30 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -1935,7 +1935,7 @@ static int rt2800_get_gain_calibration_delta(struct rt2x00_dev *rt2x00dev)
/*
* Check if temperature compensation is supported.
*/
- if (tssi_bounds[4] == 0xff)
+ if (tssi_bounds[4] == 0xff || step == 0xff)
return 0;
/*