QCA988x and kernel 4.13

svp s.pooheer at gmail.com
Sat Sep 30 01:39:08 PDT 2017


After upgrade to 4.13 have errors in log

kernel: INFO: task kworker/u8:5:113 blocked for more than 120 seconds.
kernel:       Tainted: G           O    4.13.3-1-ARCH #1
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this essage.
kernel: kworker/u8:5    D    0   113      2 0x00000000
kernel: Workqueue: phy0 ieee80211_ba_session_work [mac80211]
kernel: Call Trace:
kernel:  __schedule+0x239/0x890
kernel:  schedule+0x3d/0x90
kernel:  schedule_preempt_disabled+0x15/0x20
kernel:  __mutex_lock.isra.2+0x295/0x520
kernel:  ? ttwu_do_wakeup+0x1e/0x160
kernel:  __mutex_lock_slowpath+0x13/0x20
kernel:  ? update_load_avg+0x426/0x5a0
kernel:  ? __mutex_lock_slowpath+0x13/0x20
kernel:  mutex_lock+0x25/0x30
kernel:  __ieee80211_start_rx_ba_session+0x153/0x520 [mac80211]
kernel:  ieee80211_ba_session_work+0x164/0x250 [mac80211]
kernel:  process_one_work+0x1de/0x430
kernel:  worker_thread+0x47/0x3f0
kernel:  kthread+0x125/0x140
kernel:  ? process_one_work+0x430/0x430
kernel:  ? kthread_create_on_node+0x70/0x70
kernel:  ret_from_fork+0x25/0x30

Then this system became unstable.

06:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac Wireless 
Network Adapter

uname -a
Linux I5-4670 4.13.3-1-ARCH #1 SMP PREEMPT Thu Sep 21 20:33:16 CEST 2017 x86_64 

wlp6s0    IEEE 802.11  Mode:Master  Tx-Power=30 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Power Management:on

firmware-5.bin_10. was used


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