[PATCH 3.13 169/198] b43: fix frequency reported on G-PHY with /new/ firmware

From: Kamal Mostafa
Date: Tue Jul 15 2014 - 18:03:15 EST -stable review patch. If anyone has any objections, please let me know.


From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@xxxxxxxxx>

commit 2fc68eb122c7ea6cd5be1fe7d6650c0beb2f4f40 upstream.

Support for firmware rev 508+ was added years ago, but we never noticed
it reports channel in a different way for G-PHY devices. Instead of
offset from 2400 MHz it simply passes channel id (AKA hw_value).

So far it was (most probably) affecting monitor mode users only, but
the following recent commit made it noticeable for quite everybody:

commit 3afc2167f60a327a2c1e1e2600ef209a3c2b75b7
Author: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
Date: Tue Mar 4 16:50:13 2014 +0200

cfg80211/mac80211: ignore signal if the frame was heard on wrong channel

Reported-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
Signed-off-by: RafaÅ MiÅecki <zajec5@xxxxxxxxx>
Tested-by: Aaro Koskinen <aaro.koskinen@xxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
drivers/net/wireless/b43/xmit.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index 50e5ddb..628ff62 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -810,9 +810,13 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
case B43_PHYTYPE_G:
status.band = IEEE80211_BAND_2GHZ;
- /* chanid is the radio channel cookie value as used
- * to tune the radio. */
- status.freq = chanid + 2400;
+ /* Somewhere between 478.104 and 508.1084 firmware for G-PHY
+ * has been modified to be compatible with N-PHY and others.
+ */
+ if (dev->fw.rev >= 508)
+ status.freq = ieee80211_channel_to_frequency(chanid, status.band);
+ else
+ status.freq = chanid + 2400;
case B43_PHYTYPE_N:
case B43_PHYTYPE_LP:

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