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Date: Tue, 3 Jul 2012 19:27:26 +0800
From: wfg@...ux.intel.com
To: Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>
Cc: Johannes Berg <johannes.berg@...el.com>,
LKML <linux-kernel@...r.kernel.org>
Subject: [mac80211-next:for-john] WARNING: at
/c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
Hi Vladimir,
The below commit triggers a warning.
tree: git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git for-john
head: ba0afa2f22e1e3f332e45460f99328025d44564e
commit: 3a0c52a6d82cc41da965284412608c74aece34e4 [648/651] cfg80211: add 802.11ad (60gHz band) support
647: b d9b3b28 2012-07-02 14:47:44 +0200 mac80211: allow calling ieee80211_ap_probereq_get() during auth/assoc
648: B 3a0c52a [ 72.865235] WARNING: at /c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
649: B 90cdc6d [ 64.868502] WARNING: at /c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
650: B b188148 [ 30.024352] WARNING: at /c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
651: B ba0afa2 [ 77.237955] WARNING: at /c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
[b] boot OK [B] kernel boots with some problem
[ 72.862898] mac80211_hwsim: Initializing radio 0
[ 72.864155] ------------[ cut here ]------------
[ 72.865235] WARNING: at /c/kernel-tests/net/net/wireless/core.c:471 wiphy_register+0x401/0x451()
[ 72.867261] Hardware name: Bochs
[ 72.868096] Modules linked in:
[ 72.868885] Pid: 1, comm: swapper/0 Not tainted 3.5.0-rc1+ #4
[ 72.870152] Call Trace:
[ 72.870885] [<ffffffff81090261>] warn_slowpath_common+0x83/0x9c
[ 72.872241] [<ffffffff81090294>] warn_slowpath_null+0x1a/0x1c
[ 72.873542] [<ffffffff82c293e3>] wiphy_register+0x401/0x451
[ 72.874835] [<ffffffff811758a0>] ? __kmalloc+0x128/0x13a
[ 72.876069] [<ffffffff82c46713>] ? ieee80211_register_hw+0x113/0x5dc
[ 72.877473] [<ffffffff82c469a4>] ieee80211_register_hw+0x3a4/0x5dc
[ 72.878944] [<ffffffff8464e113>] init_mac80211_hwsim+0x423/0x6a0
[ 72.880294] [<ffffffff8464dcf0>] ? carl9170_driver_init+0x1b/0x1b
[ 72.881671] [<ffffffff81002099>] do_one_initcall+0x7f/0x13a
[ 72.882985] [<ffffffff845f0d39>] kernel_init+0x170/0x1f8
[ 72.884215] [<ffffffff845f0590>] ? do_early_param+0x8c/0x8c
[ 72.885483] [<ffffffff82e516b4>] kernel_thread_helper+0x4/0x10
[ 72.886787] [<ffffffff82e498f0>] ? retint_restore_args+0x13/0x13
[ 72.888244] [<ffffffff845f0bc9>] ? start_kernel+0x3e7/0x3e7
[ 72.889506] [<ffffffff82e516b0>] ? gs_change+0x13/0x13
[ 72.890695] ---[ end trace bd81035d49db0c0f ]---
[ 72.891797] mac80211_hwsim: ieee80211_register_hw failed (-22)
commit 3a0c52a6d82cc41da965284412608c74aece34e4
Author: Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>
Date: Mon Jul 2 09:32:32 2012 +0300
cfg80211: add 802.11ad (60gHz band) support
Add enumerations for both cfg80211 and nl80211.
This expands wiphy.bands etc. arrays.
Extend channel <-> frequency translation to cover 60g band
and modify the rate check logic since there are no legacy
mandatory rates (only MCS is used.)
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@....qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@...el.com>
diff --git a/drivers/net/wireless/iwlegacy/3945-rs.c b/drivers/net/wireless/iwlegacy/3945-rs.c
index 4b10157..d4fd29a 100644
--- a/drivers/net/wireless/iwlegacy/3945-rs.c
+++ b/drivers/net/wireless/iwlegacy/3945-rs.c
@@ -946,7 +946,7 @@ il3945_rate_scale_init(struct ieee80211_hw *hw, s32 sta_id)
case IEEE80211_BAND_5GHZ:
rs_sta->expected_tpt = il3945_expected_tpt_a;
break;
- case IEEE80211_NUM_BANDS:
+ default:
BUG();
break;
}
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 2300327..74cc55c 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -2545,10 +2545,12 @@ enum nl80211_tx_rate_attributes {
* enum nl80211_band - Frequency band
* @NL80211_BAND_2GHZ: 2.4 GHz ISM band
* @NL80211_BAND_5GHZ: around 5 GHz band (4.9 - 5.7 GHz)
+ * @NL80211_BAND_60GHZ: around 60 GHz band (58.32 - 64.80 GHz)
*/
enum nl80211_band {
NL80211_BAND_2GHZ,
NL80211_BAND_5GHZ,
+ NL80211_BAND_60GHZ,
};
/**
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index fa26934..0b564e8 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -70,11 +70,13 @@
*
* @IEEE80211_BAND_2GHZ: 2.4GHz ISM band
* @IEEE80211_BAND_5GHZ: around 5GHz band (4.9-5.7)
+ * @IEEE80211_BAND_60GHZ: around 60 GHz band (58.32 - 64.80 GHz)
* @IEEE80211_NUM_BANDS: number of defined bands
*/
enum ieee80211_band {
IEEE80211_BAND_2GHZ = NL80211_BAND_2GHZ,
IEEE80211_BAND_5GHZ = NL80211_BAND_5GHZ,
+ IEEE80211_BAND_60GHZ = NL80211_BAND_60GHZ,
/* keep last */
IEEE80211_NUM_BANDS
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4e75303..4990f4f 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -140,6 +140,8 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
if (r->flags & IEEE80211_RATE_MANDATORY_A)
mrate = r->bitrate;
break;
+ case IEEE80211_BAND_60GHZ:
+ /* TODO, for now fall through */
case IEEE80211_NUM_BANDS:
WARN_ON(1);
break;
diff --git a/net/wireless/core.c b/net/wireless/core.c
index ca2b95f..e13365f 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -468,8 +468,14 @@ int wiphy_register(struct wiphy *wiphy)
continue;
sband->band = band;
-
- if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
+ if (WARN_ON(!sband->n_channels))
+ return -EINVAL;
+ /*
+ * on 60gHz band, there are no legacy rates, so
+ * n_bitrates is 0
+ */
+ if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
+ !sband->n_bitrates))
return -EINVAL;
/*
diff --git a/net/wireless/util.c b/net/wireless/util.c
index a9260ac..0228c64 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -35,19 +35,29 @@ int ieee80211_channel_to_frequency(int chan, enum ieee80211_band band)
{
/* see 802.11 17.3.8.3.2 and Annex J
* there are overlapping channel numbers in 5GHz and 2GHz bands */
- if (band == IEEE80211_BAND_5GHZ) {
- if (chan >= 182 && chan <= 196)
- return 4000 + chan * 5;
- else
- return 5000 + chan * 5;
- } else { /* IEEE80211_BAND_2GHZ */
+ if (chan <= 0)
+ return 0; /* not supported */
+ switch (band) {
+ case IEEE80211_BAND_2GHZ:
if (chan == 14)
return 2484;
else if (chan < 14)
return 2407 + chan * 5;
+ break;
+ case IEEE80211_BAND_5GHZ:
+ if (chan >= 182 && chan <= 196)
+ return 4000 + chan * 5;
else
- return 0; /* not supported */
+ return 5000 + chan * 5;
+ break;
+ case IEEE80211_BAND_60GHZ:
+ if (chan < 5)
+ return 56160 + chan * 2160;
+ break;
+ default:
+ ;
}
+ return 0; /* not supported */
}
EXPORT_SYMBOL(ieee80211_channel_to_frequency);
@@ -60,8 +70,12 @@ int ieee80211_frequency_to_channel(int freq)
return (freq - 2407) / 5;
else if (freq >= 4910 && freq <= 4980)
return (freq - 4000) / 5;
- else
+ else if (freq <= 45000) /* DMG band lower limit */
return (freq - 5000) / 5;
+ else if (freq >= 58320 && freq <= 64800)
+ return (freq - 56160) / 2160;
+ else
+ return 0;
}
EXPORT_SYMBOL(ieee80211_frequency_to_channel);
@@ -137,6 +151,11 @@ static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
}
WARN_ON(want != 0 && want != 3 && want != 6);
break;
+ case IEEE80211_BAND_60GHZ:
+ /* check for mandatory HT MCS 1..4 */
+ WARN_ON(!sband->ht_cap.ht_supported);
+ WARN_ON((sband->ht_cap.mcs.rx_mask[0] & 0x1e) != 0x1e);
+ break;
case IEEE80211_NUM_BANDS:
WARN_ON(1);
break;
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