Krzysztof wrote: > Hi, > > I recently tried to select a single antenna on AR9300 and it works for > 30 seconds only. The subsequent calibration makes the RX signal level to > drop from the usual -30/-40 dBm to -70/-80 dBm, and the transmission > practically stops. > > With the attached patch it works, though selecting the antenna doesn't > seem to have any visible effect, at least with "iw wlanX station dump" > (perhaps it works for TX). > > I'm using ad-hoc mode: > > rmmod ath9k > modprobe ath9k > iw dev wlan0 set type ibss > iw phy phyX set antenna 2 > ip link set up dev wlan0 > iw dev wlan0 set bitrates legacy-2.4 18 > iw dev wlan0 ibss join nameXXX freqYYY > ip addr add ZZZ broadcast + dev wlan0 > > The card in question is Mikrotik (Routerboard) R11e-2HPnD mPCIe adapter: > AR9580 Wireless Network Adapter (rev 01), ID 168c:0033, subsystem > 19b6:d016. > ieee80211 phy0: Atheros AR9300 Rev:4 mem=0xc0f40000, irq=334 > https://routerboard.com/R11e-2HPnD > > Linux 4.9.0-rc5. > > > Is there a better way? > > Signed-off-by: Krzysztof Halasa <khalasa@xxxxxxx> > > diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c > index e9f32b5..7f17e5d 100644 > --- a/drivers/net/wireless/ath/ath9k/main.c > +++ b/drivers/net/wireless/ath/ath9k/main.c > @@ -2245,7 +2245,7 @@ static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) > return 0; > > /* AR9100 runs into calibration issues if not all rx chains are enabled */ > - if (AR_SREV_9100(ah)) > + if (AR_SREV_9100(ah) || AR_SREV_9300(ah)) > ah->rxchainmask = 0x7; > else > ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant); I'll assume this is an RFC patch. Please resubmit if this is the right approach. Patch set to RFC. -- https://patchwork.kernel.org/patch/9429263/ Documentation about submitting wireless patches and checking status from patchwork: https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
