summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorStanislaw Gruszka <sgruszka@redhat.com>2013-06-12 16:44:50 +0200
committerJohn W. Linville <linville@tuxdriver.com>2013-06-12 15:06:57 -0400
commitc72456c75ae48d4d747c2ad4f7fe82601484a949 (patch)
treeac35b016794f4f43a173b63a1a5d7522eed5cf3e
parent8cdbab7f07e82f26c48adcc761391c1c7ff339ff (diff)
downloadlinux-c72456c75ae48d4d747c2ad4f7fe82601484a949.tar.bz2
iwl3945: workaround for firmware frame tx rejection
Firmware can reject to transmit frame on passive channel, when it did not yet received any frame with valid CRC on that channel. Workaround this problem in the driver. Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/iwlegacy/3945.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlegacy/3945.c b/drivers/net/wireless/iwlegacy/3945.c
index dc1e6da9976a..c092033945cc 100644
--- a/drivers/net/wireless/iwlegacy/3945.c
+++ b/drivers/net/wireless/iwlegacy/3945.c
@@ -331,6 +331,19 @@ il3945_hdl_tx(struct il_priv *il, struct il_rx_buf *rxb)
return;
}
+ /*
+ * Firmware will not transmit frame on passive channel, if it not yet
+ * received some valid frame on that channel. When this error happen
+ * we have to wait until firmware will unblock itself i.e. when we
+ * note received beacon or other frame. We unblock queues in
+ * il3945_pass_packet_to_mac80211 or in il_mac_bss_info_changed.
+ */
+ if (unlikely((status & TX_STATUS_MSK) == TX_STATUS_FAIL_PASSIVE_NO_RX) &&
+ il->iw_mode == NL80211_IFTYPE_STATION) {
+ il_stop_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
+ D_INFO("Stopped queues - RX waiting on passive channel\n");
+ }
+
txq->time_stamp = jiffies;
info = IEEE80211_SKB_CB(txq->skbs[txq->q.read_ptr]);
ieee80211_tx_info_clear_status(info);
@@ -488,6 +501,11 @@ il3945_pass_packet_to_mac80211(struct il_priv *il, struct il_rx_buf *rxb,
return;
}
+ if (unlikely(test_bit(IL_STOP_REASON_PASSIVE, &il->stop_reason))) {
+ il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
+ D_INFO("Woke queues - frame received on passive channel\n");
+ }
+
skb = dev_alloc_skb(128);
if (!skb) {
IL_ERR("dev_alloc_skb failed\n");