From 68acc4afb040d98ddfd2cae0de09e2f4e1ee127f Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Fri, 23 Dec 2011 08:13:50 +0100 Subject: [PATCH] iwlegacy: 3945: fix hw passive scan on radar channels Patch fix firmware error on "iw dev wlan0 scan passive" for hardware scanning (with disable_hw_scan=0 module parameter). iwl3945 0000:03:00.0: Microcode SW error detected. Restarting 0x82000008. iwl3945 0000:03:00.0: Loaded firmware version: 15.32.2.9 iwl3945 0000:03:00.0: Start IWL Error Log Dump: iwl3945 0000:03:00.0: Status: 0x0002A2E4, count: 1 iwl3945 0000:03:00.0: Desc Time asrtPC blink2 ilink1 nmiPC Line iwl3945 0000:03:00.0: SYSASSERT (0x5) 0041263900 0x13756 0x0031C 0x00000 764 iwl3945 0000:03:00.0: Error Reply type 0x000002FC cmd C_SCAN (0x80) seq 0x443E ser 0x00340000 iwl3945 0000:03:00.0: Command C_SCAN failed: FW Error iwl3945 0000:03:00.0: Can't stop Rx DMA. We have disable ability to change passive scanning to active on particular channel when traffic is detected on that channel. Otherwise firmware will report error, when we try to do passive scan on radar channels. Reported-and-debugged-by: Pedro Francisco Signed-off-by: Stanislaw Gruszka Signed-off-by: John W. Linville --- drivers/net/wireless/iwlegacy/3945-mac.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/iwlegacy/3945-mac.c b/drivers/net/wireless/iwlegacy/3945-mac.c index c8179756bf3c..54b2d391e91a 100644 --- a/drivers/net/wireless/iwlegacy/3945-mac.c +++ b/drivers/net/wireless/iwlegacy/3945-mac.c @@ -2623,12 +2623,12 @@ il3945_request_scan(struct il_priv *il, struct ieee80211_vif *vif) } /* - * If active scaning is requested but a certain channel - * is marked passive, we can do active scanning if we - * detect transmissions. + * If active scaning is requested but a certain channel is marked + * passive, we can do active scanning if we detect transmissions. For + * passive only scanning disable switching to active on any channel. */ scan->good_CRC_th = - is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_DISABLED; + is_active ? IL_GOOD_CRC_TH_DEFAULT : IL_GOOD_CRC_TH_NEVER; len = il_fill_probe_req(il, (struct ieee80211_mgmt *)scan->data, -- 2.20.1