Re: [RFT 0/4] ath10k: fix flushing and tx stalls

[Ben Greear <greearb@candelatech.com>]

On 04/04/2014 04:37 AM, Michal Kazior wrote:
> Hi,
>
> After digging around I've found what seems to be
> the problem with WMI Tx credit starvation and
> inability to properly flush Tx in ath10k_flush().

I applied all four, rebooted AP and Station machine with the
new kernel (3.14.0-wl-ath+).  I had removed my own tx-hang detection
hack.

It is not working well...though perhaps it is not directly related
to your patches...I will do some reboots and try reversing some patches.
But, 3.14.0-rc8-wl-ath+ was working mostly OK for me....

It seems my user-space app got hung, probably because rtnl was being
held too long while doing admin-down on a bunch of stations.

Out of 32 stations, maybe 5 of them managed to come up and get
an IP address through DHCP before user-space app hung and log
started filling with the errors at the end of the dmesg below.


sta218: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta218: link becomes ready
sta219: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 19 beacon_interval 100
ath10k: mac vdev 19 create peer 04:f0:21:03:38:99
ath10k: mac vdev 19 start 04:f0:21:03:38:99
ath10k: mac vdev 19 start center_freq 5180 phymode 11ac-vht80

sta219: send auth to 04:f0:21:03:38:99 (try 1/3)
sta219: authenticated
sta218: deauthenticating from 04:f0:21:03:38:99 by local choice (Reason: 3=DEAUTH_LEAVING)
ath10k: mac flushing peer 04:f0:21:03:38:99 on vdev 18 mgmt tid for unicast mgmt
ath10k: mac vdev 18 peer delete 04:f0:21:03:38:99 (sta gone)
ath10k: mac vdev 18 stop (disassociated
ath10k: mac vdev 18 down
ath10k: mac vdev 18 cts_prot 0
ath10k: mac vdev 18 slot_time 1
ath10k: mac vdev 18 preamble 1n
sta219: associate with 04:f0:21:03:38:99 (try 1/3)
sta219: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=22)
ath10k: mac vdev 19 dtim_period 2
ath10k: mac vdev 19 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 19 up (associated) bssid 04:f0:21:03:38:99 aid 22
sta219: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta219: link becomes ready
sta220: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 20 beacon_interval 100
ath10k: mac vdev 20 create peer 04:f0:21:03:38:99
ath10k: mac vdev 20 start 04:f0:21:03:38:99
ath10k: mac vdev 20 start center_freq 5180 phymode 11ac-vht80
sta220: send auth to 04:f0:21:03:38:99 (try 1/3)
sta220: authenticated
sta220: associate with 04:f0:21:03:38:99 (try 1/3)
sta220: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=23)
ath10k: mac vdev 20 dtim_period 2
ath10k: mac vdev 20 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 20 up (associated) bssid 04:f0:21:03:38:99 aid 23
sta220: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta220: link becomes ready
ath10k: Creating vdev id: 21  map: 4292870144
ath10k: mac vdev create 21 (add interface) type 2 subtype 0
ath10k: mac vdev 21 cts_prot 0
ath10k: mac vdev 21 slot_time 1
ath10k: mac vdev 21 preamble 1n
IPv6: ADDRCONF(NETDEV_UP): sta221: link is not ready
ath10k: mac vdev 21 delete (remove interface)
ath10k: peer-unmap-event: unknown peer id 23
ath10k: Creating vdev id: 21  map: 4292870144
ath10k: mac vdev create 21 (add interface) type 2 subtype 0
ath10k: mac vdev 21 cts_prot 0
ath10k: mac vdev 21 slot_time 1
ath10k: mac vdev 21 preamble 1n
IPv6: ADDRCONF(NETDEV_UP): sta221: link is not ready
sta217: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 17 beacon_interval 100
ath10k: mac vdev 17 create peer 04:f0:21:03:38:99
ath10k: mac vdev 17 start 04:f0:21:03:38:99
ath10k: mac vdev 17 start center_freq 5180 phymode 11ac-vht80

sta217: send auth to 04:f0:21:03:38:99 (try 1/3)
sta217: authenticated
sta217: associate with 04:f0:21:03:38:99 (try 1/3)
sta217: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=20)
ath10k: mac vdev 17 dtim_period 2
ath10k: mac vdev 17 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 17 up (associated) bssid 04:f0:21:03:38:99 aid 20
sta217: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta217: link becomes ready
sta218: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 18 beacon_interval 100
ath10k: mac vdev 18 create peer 04:f0:21:03:38:99
ath10k: mac vdev 18 start 04:f0:21:03:38:99
ath10k: mac vdev 18 start center_freq 5180 phymode 11ac-vht80
sta218: send auth to 04:f0:21:03:38:99 (try 1/3)
ath10k: Creating vdev id: 22  map: 4290772992
ath10k: mac vdev create 22 (add interface) type 2 subtype 0
sta218: authenticated
ath10k: mac vdev 22 cts_prot 0
ath10k: mac vdev 22 slot_time 1
ath10k: mac vdev 22 preamble 1n
IPv6: ADDRCONF(NETDEV_UP): sta222: link is not ready
sta218: associate with 04:f0:21:03:38:99 (try 1/3)
sta218: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=18)
ath10k: mac vdev 18 dtim_period 2
ath10k: mac vdev 18 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 18 up (associated) bssid 04:f0:21:03:38:99 aid 18
sta218: associated
sta222: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 22 beacon_interval 100
ath10k: mac vdev 22 create peer 04:f0:21:03:38:99
ath10k: mac vdev 22 start 04:f0:21:03:38:99
ath10k: mac vdev 22 start center_freq 5180 phymode 11ac-vht80

sta222: send auth to 04:f0:21:03:38:99 (try 1/3)
ath10k: mac vdev 22 peer delete 04:f0:21:03:38:99 (sta gone)
ath10k: mac vdev 22 stop (disassociated
ath10k: mac vdev 22 down
ath10k: mac vdev 22 delete (remove interface)
ath10k: peer-unmap-event: unknown peer id 24
ath10k: Creating vdev id: 22  map: 4290772992
ath10k: mac vdev create 22 (add interface) type 2 subtype 0
ath10k: mac vdev 22 cts_prot 0
ath10k: mac vdev 22 slot_time 1
ath10k: mac vdev 22 preamble 1n
IPv6: ADDRCONF(NETDEV_UP): sta222: link is not ready
sta221: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 21 beacon_interval 100
ath10k: mac vdev 21 create peer 04:f0:21:03:38:99
ath10k: mac vdev 21 start 04:f0:21:03:38:99
ath10k: mac vdev 21 start center_freq 5180 phymode 11ac-vht80

sta221: send auth to 04:f0:21:03:38:99 (try 1/3)
sta221: authenticated
sta221: associate with 04:f0:21:03:38:99 (try 1/3)
sta221: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=19)
ath10k: mac vdev 21 dtim_period 2
ath10k: mac vdev 21 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 21 up (associated) bssid 04:f0:21:03:38:99 aid 19
sta221: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta221: link becomes ready
sta222: authenticate with 04:f0:21:03:38:99
ath10k: mac vdev 22 beacon_interval 100
ath10k: mac vdev 22 create peer 04:f0:21:03:38:99
ath10k: mac vdev 22 start 04:f0:21:03:38:99
ath10k: mac vdev 22 start center_freq 5180 phymode 11ac-vht80
sta222: send auth to 04:f0:21:03:38:99 (try 1/3)
sta222: authenticated
sta222: associate with 04:f0:21:03:38:99 (try 1/3)
sta222: RX AssocResp from 04:f0:21:03:38:99 (capab=0x1 status=0 aid=24)
ath10k: mac vdev 22 dtim_period 2
ath10k: mac vdev 22 slot_time 2
ath10k: mac ht peer 04:f0:21:03:38:99 mcs cnt 24 nss 3
ath10k: mac vht peer 04:f0:21:03:38:99 max_mpdu 65535 flags 0x6003001
ath10k: mac peer 04:f0:21:03:38:99 phymode 11ac-vht80
ath10k: mac vdev 22 up (associated) bssid 04:f0:21:03:38:99 aid 24
sta222: associated
IPv6: ADDRCONF(NETDEV_CHANGE): sta222: link becomes ready

sta213: deauthenticating from 04:f0:21:03:38:99 by local choice (Reason: 3=DEAUTH_LEAVING)
ath10k: mac flushing peer 04:f0:21:03:38:99 on vdev 13 mgmt tid for unicast mgmt
ath10k: mac vdev 13 peer delete 04:f0:21:03:38:99 (sta gone)
ath10k: mac vdev 13 stop (disassociated
ath10k: mac vdev 13 down
ath10k: mac vdev 13 cts_prot 0
ath10k: mac vdev 13 slot_time 1

ath10k: failed to set erp slot for vdev 13: -11
ath10k: mac vdev 13 preamble 1n
ath10k: failed to set preamble for vdev 13: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: mac vdev 13 delete (remove interface)
ath10k: failed to delete WMI vdev 13: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
sta219: deauthenticating from 04:f0:21:03:38:99 by local choice (Reason: 3=DEAUTH_LEAVING)
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: mac vdev 19 peer delete 04:f0:21:03:38:99 (sta gone)
ath10k: failed to request wmi peer 04:f0:21:03:38:99 on vdev 19 removal: -11
ath10k: removing peer 04:f0:21:03:38:99 on vdev 19 still being mapped in firmware
ath10k: mac vdev 19 stop (disassociated
ath10k: failed to stop WMI vdev 19: -11
ath10k: mac vdev 19 down
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: mac vdev 19 cts_prot 0
ath10k: failed to recalculate rts/cts prot for vdev 19: -11
ath10k: mac vdev 19 slot_time 1
ath10k: failed to set erp slot for vdev 19: -11
ath10k: mac vdev 19 preamble 1n
ath10k: failed to set preamble for vdev 19: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: failed to set wmm params: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: mac vdev 19 delete (remove interface)
ath10k: failed to delete WMI vdev 19: -11
ath10k: failed to wait for tx to flush: -110, forcing
ath10k: failed to request peer 04:f0:21:03:38:99 on vdev 22 to flush ffffffff: -11
ath10k: failed to flush all peer tids: -11
ath10k: mac vdev 0 peer delete 04:f0:21:03:38:99 (sta gone)
ath10k: failed to request wmi peer 04:f0:21:03:38:99 on vdev 0 removal: -11
ath10k: removing peer 04:f0:21:03:38:99 on vdev 0 still being mapped in firmware
ath10k: mac vdev 0 stop (disassociated
ath10k: failed to stop WMI vdev 0: -11
ath10k: mac vdev 0 down
ath10k: mac vdev 0 cts_prot 0
ath10k: failed to recalculate rts/cts prot for vdev 0: -11
ath10k: mac vdev 0 slot_time 1
ath10k: failed to set erp slot for vdev 0: -11
ath10k: mac vdev 0 preamble 1n
ath10k: failed to set preamble for vdev 0: -11
ath10k: failed to set wmm params: -11

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com


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