#9654: ath: DMA failed to stop in 10 ms
------------------------+-----------------------------------
Reporter: anonymous | Owner: nbd
Type: defect | Status: reopened
Priority: normal | Milestone: Barrier Breaker 14.07
Component: kernel | Version: Trunk
Resolution: | Keywords: atheros
------------------------+-----------------------------------
Comment (by bittorf@…):
still happening with r45583 on TP-LINK TL-WR1043ND
this happend during normal run, no 'wifi up' involved.
{{{
[ 45.440000] random: nonblocking pool is initialized
[76897.160000] ath: phy0: DMA failed to stop in 10 ms AR_CR=0x00000024
AR_DIAG_SW=0x42000020 DMADBG_7=0x000286c0
[76897.170000] ath: phy0: Could not stop RX, we could be confusing the DMA
engine when we start RX up
[76897.180000] ------------[ cut here ]------------
[76897.190000] WARNING: CPU: 0 PID: 304 at /home/bastian/openwrt/build_dir
/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/compat-
wireless-2015-03-09/drivers/net/wireless/ath/ath9k/recv.c:502
ath_stoprecv+0x108/0x138c [ath9k]()
[76897.210000] Modules linked in: ath9k ath9k_common pppoe ppp_async
iptable_nat ath9k_hw ath pppox ppp_generic nf_nat_ipv4 nf_conntrack_ipv6
nf_conntrack_ipv4 mac80211 ipt_REJECT ipt_MASQUERADE cfg80211 xt_time
xt_tcpudp xt_tcpmss xt_statistic xt_state xt_nat xt_multiport xt_mark
xt_mac xt_limit xt_length xt_id xt_hl xt_ecn xt_dscp xt_conntrack
xt_comment xt_TCPMSS xt_REDIRECT xt_NETMAP xt_LOG xt_HL xt_DSCP xt_CT
xt_CLASSIFY slhc nf_reject_ipv4 nf_nat_masquerade_ipv4 nf_nat_ftp nf_nat
nf_log_ipv4 nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache
nf_conntrack_ftp nf_conntrack macvlan iptable_raw iptable_mangle
iptable_filter ipt_ECN ip_tables crc_ccitt compat sch_tbf sch_sfq sch_red
sch_prio sch_htb sch_gred sch_dsmark sch_codel em_text em_nbyte em_meta
em_cmp cls_basic act_police act_ipt act_skbedit act_mirred em_u32 cls_u32
cls_tcindex cls_flow cls_route cls_fw sch_hfsc sch_ingress ledtrig_usbdev
ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_raw
ip6table_mangle ip6table_filter ip6_tables x_tables tun zram
lz4_decompress lz4_compress ipv6 arc4 crypto_blkcipher lzo_compress
lzo_decompress zsmalloc ehci_platform ehci_hcd gpio_button_hotplug usbcore
nls_base usb_common
[76897.310000] CPU: 0 PID: 304 Comm: kworker/u2:0 Not tainted 3.18.11 #5
[76897.320000] Workqueue: phy0 ath_reset_work [ath9k]
[76897.330000] Stack : 00000001 00000000 81f37f80 80304798 80914944
80906fdc 000001f6 818cc264
[76897.330000] 818cc038 80972b04 00000088 800a3400 00000130 80096130
819dade0 818cc264
[76897.330000] 803153f8 809cbcfc 809cbcfc 800a3400 00000003 80093b20
000001f6 00000000
[76897.330000] 00000000 00000000 00000000 00000000 00000000 00000000
00000000 00000000
[76897.330000] 70687930 00000000 00000000 00000000 00000000 00000000
80b04000 80b04100
[76897.330000] ...
[76897.360000] Call Trace:
[76897.360000] [<80070fd8>] show_stack+0x48/0x70
[76897.370000] [<8008044c>] warn_slowpath_common+0x84/0xb4
[76897.370000] [<80080504>] warn_slowpath_null+0x18/0x24
[76897.380000] [<80906fdc>] ath_stoprecv+0x108/0x138c [ath9k]
[76897.380000] [<80902834>] ath9k_deinit_device+0x2c0/0x908 [ath9k]
[76897.390000] [<80904d1c>] ath9k_calculate_summary_state+0x5e4/0x728
[ath9k]
[76897.400000]
[76897.400000] ---[ end trace d634703aa1c443d8 ]---
}}}
--
Ticket URL: <https://dev.openwrt.org/ticket/9654#comment:548>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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