#12391: ath9k reading of /sys/kernel/debug/ieee80211/phy0/ath9k/regdump produces
data bus error
---------------------+--------------------------------------------
Reporter: mm@… | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Barrier Breaker 14.07
Component: kernel | Version: Attitude Adjustment 12.09 Beta
Resolution: | Keywords: ath9k WDR4300 AR9344
---------------------+--------------------------------------------
Comment (by anonymous):
this is still relevant with kernel 3.14 in normal operation.
is this fixed upstream with ath9k in kernel 3.18?
{{{
[ 3186.110000] Data bus error, epc == 86d285fc, ra == 86d285fc
[ 3186.110000] Oops[#1]:
[ 3186.110000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.14.35 #4
[ 3186.110000] task: 80355070 ti: 80344000 task.ti: 80344000
[ 3186.110000] $ 0 : 00000000 00000000 deadc0de 1100dc03
[ 3186.110000] $ 4 : b00080f8 000080f8 00000040 00000000
[ 3186.110000] $ 8 : 00000014 4db26158 ffffffec 850da6b5
[ 3186.110000] $12 : 00000c72 000000cd 00000000 00000000
[ 3186.110000] $16 : 868ea030 868ea010 002c09de 00000064
[ 3186.110000] $20 : 00000000 00000000 80350000 00000001
[ 3186.110000] $24 : 00000000 802a4830
[ 3186.110000] $28 : 80344000 80345c10 00000004 86d285fc
[ 3186.110000] Hi : 00000001
[ 3186.110000] Lo : 00000001
[ 3186.110000] epc : 86d285fc ath_hw_cycle_counters_update+0x54/0x19c
[ath]
[ 3186.110000] Not tainted
[ 3186.110000] ra : 86d285fc ath_hw_cycle_counters_update+0x54/0x19c
[ath]
[ 3186.110000] Status: 1100dc03 KERNEL EXL IE
[ 3186.110000] Cause : 0080041c
[ 3186.110000] PrId : 0001974c (MIPS 74Kc)
[ 3186.110000] Modules linked in: iptable_nat ath9k nf_nat_ipv4
nf_conntrack_netlink nf_conntrack_ipv6 nf_conntrack_ipv4 ipt_MASQUERADE
cp210x ath9k_common xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state
xt_quota xt_policy xt_pkttype xt_owner xt_nat xt_multiport xt_mark xt_mac
xt_limit xt_length xt_id xt_hl xt_esp xt_ecn xt_dscp xt_conntrack
xt_comment xt_addrtype xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_DSCP xt_CT
xt_CLASSIFY usbserial rfcomm nfnetlink nf_nat nf_defrag_ipv6
nf_defrag_ipv4 nf_conntrack_rtcache nf_conntrack iptable_raw
iptable_mangle iptable_filter ipt_ah ipt_REJECT ipt_ECN ip_tables hidp
hci_uart crc_ccitt btusb bnep bluetooth ath9k_hw 6lowpan_iphc em_cmp
em_nbyte sch_dsmark em_meta sch_gred sch_htb sch_teql act_ipt sch_red
sch_codel act_police em_text sch_tbf sch_sfq cls_basic sch_prio
act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route
cls_fw sch_hfsc sch_ingress hid evdev input_core ath10k_pci ath10k_core
ath mac80211 cfg80211 compat ledtrig_usbdev ledtrig_gpio batman_adv
libcrc32c crc16 ip6t_REJECT ip6table_raw ip6table_mangle ip6table_filter
ip6_tables x_tables ipcomp6 xfrm6_tunnel xfrm6_mode_tunnel
xfrm6_mode_transport xfrm6_mode_beet esp6 ah6 ipcomp xfrm4_tunnel
xfrm4_mode_tunnel xfrm4_mode_transport xfrm4_mode_beet esp4 ah4 tunnel6
tunnel4 tun af_key xfrm_user xfrm_ipcomp xfrm_algo ipv6 chainiv eseqiv
crypto_wq sha1_generic krng rng md5 hmac des_generic deflate zlib_inflate
zlib_deflate cbc authenc aead arc4 crypto_blkcipher ledtrig_transient
ehci_pci ehci_platform ehci_hcd gpio_button_hotplug usbcore nls_base
usb_common crc32c crypto_hash
[ 3186.110000] Process swapper (pid: 0, threadinfo=80344000,
task=80355070, tls=00000000)
[ 3186.110000] Stack : 00000026 00000070 ffffffb6 803cb080 803cb080
802a79a8 00000000 00000003
00000000 86fad44c 86ac2400 0000012c 86fad44c fffffffd 00000004
86a4709a
00000000 80355070 80345c58 80345c58 00000000 00989680 00000c72
07270e00
803cce18 80350980 80345cc8 801a871c 803d0000 803c0000 068e97d8
803c0000
00000000 00000001 803490e0 00000000 00000c72 80345cc8 00000c72
07270e00
...
[ 3186.110000] Call Trace:
[ 3186.110000] [<86d285fc>] ath_hw_cycle_counters_update+0x54/0x19c [ath]
[ 3186.110000]
[ 3186.110000]
Code: 8c420000 0040f809 340580f8 <0040a821> 8e0200ec 02202021 8c420000
0040f809 340580f4
[ 3186.410000] ---[ end trace d4bf12d6d78ced78 ]---
[ 3186.420000] Kernel panic - not syncing: Fatal exception in interrupt
[ 3186.420000] Rebooting in 3 seconds..
}}}
--
Ticket URL: <https://dev.openwrt.org/ticket/12391#comment:5>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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