On 08/20/2013 06:56 AM, Felix Fietkau wrote:
On 2013-08-20 2:28 AM, Greg Kroah-Hartman wrote:
On Tue, Aug 20, 2013 at 08:26:11AM +0800, Tom Gundersen wrote:
On Tue, Aug 20, 2013 at 8:03 AM, Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
On Tue, Aug 20, 2013 at 07:59:47AM +0800, Tom Gundersen wrote:
Hi guys,
Starting with 3.10.6 (and still present in .7) I get an oops on
connecting to the network.
The attached picture shows the oops. In case it does not reach the ML,
the top of the call trace reads:
brcms_c_compute_rtscts_dur
brcms_c_ampdu_finalize
ampdu_finalize
dma_txfast
brcms_c_txfifo
brcms_c_sendpkt_mac80211
brcms_ops_tx
__ieee80211_tx
I bisected the problem and the first bad commit is
commit ef47a5e4f1aaf1d0e2e6875e34b2c9595897bef6
Author: Felix Fietkau <nbd@xxxxxxxxxxx>
Date: Fri Jun 28 21:04:35 2013 +0200
mac80211/minstrel_ht: fix cck rate sampling
commit 1cd158573951f737fbc878a35cb5eb47bf9af3d5 upstream.
Reverting it on top of .7 fixes the problem.
I had the same (I suppose) problem on mainline some time ago, but I
have not bisected it, verified that the problem still occurs there, or
checked if reverting the upstream patch fixes it. I'd be happy to do
that if it would help though.
Let me know if you need any more information.
Do you have this same problem with 3.11-rc6 as well?
Yes, I just confirmed. I also confirmed that reverting the mainline
commit on top of -rc6 fixes the problem.
Great, thanks.
Felix and Johannes, any chance we can get this reverted in Linus tree
soon, and push that revert back to the 3.10 stable tree as well?
I'd like to avoid a revert, since that will simply replace one set of
issues with another. Let's limit the use of the feature that brcmsmac
can't handle to drivers that are known to work with it. Tom, Please
test this patch to see if it fixes your issue.
Hi Felix,
I have been diving into root causing why brcmsmac can not handle cck
fallback rates, because it should. Maybe it is better to flag no cck
support and only change brcmsmac.
Regards,
Arend
- Felix
---
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1501,6 +1501,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_SUPPORTS_RC_TABLE = 1<<24,
IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25,
IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26,
+ IEEE80211_HW_SUPPORTS_HT_CCK_RATES = 1<<27,
};
/**
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -828,6 +828,9 @@ minstrel_ht_update_cck(struct minstrel_p
if (sband->band != IEEE80211_BAND_2GHZ)
return;
+ if (!(mp->hw->flags & IEEE80211_HW_SUPPORTS_HT_CCK_RATES))
+ return;
+
mi->cck_supported = 0;
mi->cck_supported_short = 0;
for (i = 0; i < 4; i++) {
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -807,7 +807,8 @@ void ath9k_set_hw_capab(struct ath_softc
IEEE80211_HW_PS_NULLFUNC_STACK |
IEEE80211_HW_SPECTRUM_MGMT |
IEEE80211_HW_REPORTS_TX_ACK_STATUS |
- IEEE80211_HW_SUPPORTS_RC_TABLE;
+ IEEE80211_HW_SUPPORTS_RC_TABLE |
+ IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
--- a/drivers/net/wireless/ath/carl9170/main.c
+++ b/drivers/net/wireless/ath/carl9170/main.c
@@ -1878,7 +1878,8 @@ void *carl9170_alloc(size_t priv_size)
IEEE80211_HW_PS_NULLFUNC_STACK |
IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC |
IEEE80211_HW_SUPPORTS_RC_TABLE |
- IEEE80211_HW_SIGNAL_DBM;
+ IEEE80211_HW_SIGNAL_DBM |
+ IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
if (!modparam_noht) {
/*
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -6327,7 +6327,8 @@ static int rt2800_probe_hw_mode(struct r
IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_PS_NULLFUNC_STACK |
IEEE80211_HW_AMPDU_AGGREGATION |
- IEEE80211_HW_REPORTS_TX_ACK_STATUS;
+ IEEE80211_HW_REPORTS_TX_ACK_STATUS |
+ IEEE80211_HW_SUPPORTS_HT_CCK_RATES;
/*
* Don't set IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING for USB devices
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
