The patch below does not apply to the 3.11-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 6e956da2027c767859128b9bfef085cf2a8e233b Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> Date: Mon, 26 Aug 2013 15:18:53 +0200 Subject: [PATCH] rt2800: fix wrong TX power compensation We should not do temperature compensation on devices without EXTERNAL_TX_ALC bit set (called DynamicTxAgcControl on vendor driver). Such devices can have totally bogus TSSI parameters on the EEPROM, but still threaded by us as valid and result doing wrong TX power calculations. This fix inability to connect to AP on slightly longer distance on some Ralink chips/devices. Reported-and-tested-by: Fabien ADAM <id2ndr@xxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx> diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 20243dc..660d7d8 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -3408,6 +3408,13 @@ static int rt2800_get_gain_calibration_delta(struct rt2x00_dev *rt2x00dev) int i; /* + * First check if temperature compensation is supported. + */ + rt2800_eeprom_read(rt2x00dev, EEPROM_NIC_CONF1, &eeprom); + if (!rt2x00_get_field16(eeprom, EEPROM_NIC_CONF1_EXTERNAL_TX_ALC)) + return 0; + + /* * Read TSSI boundaries for temperature compensation from * the EEPROM. * -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html