On Friday 23 April 2010, Gertjan van Wingerde wrote: > On 04/23/10 15:05, Helmut Schaa wrote: > > Disable HT40 support for now as it causes rx problems with HT40 capable > > 11n APs (when mac80211 enables HT40, rx is completely disfunctional). > > > > Once the rt2800 HT code is capable of using HT40 we should enable the > > flag again. > > > > I only tested this patch with a rt305x SoC device, nevertheless the > > patch disables HT40 also on PCI and USB rt2800 devices. > > > > Signed-off-by: Helmut Schaa <helmut.schaa@xxxxxxxxxxxxxx> > > I can confirm that this also helps for PCI and USB devices. > With this patch applied all my rt28xx and rt30xx based devices starting working correctly. > > So, definately, > > Acked-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx> And also thanks for figuring this out, this at least gives a good starting point for investigation for resolving the last issues. :) Acked-by: Ivo van Doorn <IvDoorn@xxxxxxxxx> > > --- > > > > Using this patch I was able to associate a rt305x SoC device with my 11n > > capable AP using WPA and the connection basically works although I see lots > > of retried frames when sniffing the wireless traffic. > > > > If someone already had success with rt2800 and HT40 capable APs we should > > consider to only conditionally unset the HT40 flag for 305x SoC devices. > > > > drivers/net/wireless/rt2x00/rt2800lib.c | 5 ++++- > > 1 files changed, 4 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c > > index 2648f31..aa02ff6 100644 > > --- a/drivers/net/wireless/rt2x00/rt2800lib.c > > +++ b/drivers/net/wireless/rt2x00/rt2800lib.c > > @@ -2318,8 +2318,11 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev) > > else > > spec->ht.ht_supported = false; > > > > + /* > > + * Don't set IEEE80211_HT_CAP_SUP_WIDTH_20_40 for now as it causes > > + * reception problems with HT40 capable 11n APs > > + */ > > spec->ht.cap = > > - IEEE80211_HT_CAP_SUP_WIDTH_20_40 | > > IEEE80211_HT_CAP_GRN_FLD | > > IEEE80211_HT_CAP_SGI_20 | > > IEEE80211_HT_CAP_SGI_40 | > > -- 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
