[Bugme-new] [Bug 16554] New: wl1251 stalls connection completely when being asked to scan while associated
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Tue Aug 10 06:33:47 PDT 2010
https://bugzilla.kernel.org/show_bug.cgi?id=16554
Summary: wl1251 stalls connection completely when being asked
to scan while associated
Product: Drivers
Version: 2.5
Kernel Version: 2.6.35
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: network-wireless
AssignedTo: drivers_network-wireless at kernel-bugs.osdl.org
ReportedBy: ameya.palande at nokia.com
Regression: No
BUG DETAILED DESCRIPTIONS
===========================================================
When WL1251 is asked to scan while associated, wifi connection breaks down, no
pings go through, also after scan results are done.
While it's natural for active scans to slow down/stop traffic, it is not
supposed to be a permanent effect.
EXACT STEPS LEADING TO PROBLEM:
(Explain in detail what you do (e.g. tap on OK) and what you see (e.g. message
Connection Failed appears))
===========================================================
1. Disable connman, UX startup in inittab. Enable USB networking.
2. SSH in, Set up wpa supplicant config file /etc/wpasupp.conf (values cut out
to protect my local network):
ap_scan=1
network={
ssid="MYSSID"
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=CCMP TKIP
#psk="MYPSK"
psk=MYHEXPSK
}
3. wpa_supplicant -B -c /etc/wpasupp.conf -iwlan0 -Dnl80211
4. (after few seconds), dhclient wlan0
5. start ping of default gateway, watch ping away [session 1]
6. ssh in with other session, run wpa_cli, write 'scan' and 'scan_results'
afterwards
7. ping in [session 1] now stops working and continues to stop working.
Eventually shows ping: sendmsg: No buffer space available. dmesg states we are
still associated.
EXPECTED OUTCOME:
===================
Pings continuing after scan results
ACTUAL OUTCOME:
===================
Pings does not continue
USER IMPACT:
===================
User experiences wifi on N900 that does not work when associated.
REPRODUCIBILITY:
(always, less than 1/10, 5/10, 9/10)
=====================================
always
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