NOHZ tick-stop error with ath10k SDIO

[Fabio Estevam]

Hi,

When launching the hostapd application on a i.MX7 based board with an
ath10k device connected via SDIO, the following "NOHZ tick-stop error"
messages are seen:

# hostapd /etc/wifi.conf
Configuration file: /etc/wifi.conf
wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
[   63.021149] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
Using interface wlan0 with hwaddr 00:1f:7b:31:04:a0 and ssid "thessid"
[   67.332470] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: interface state COUNTRY_UPDATE->ENABLED
wlan0: AP-ENABLED
[   68.025845] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   69.025973] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   69.607432] cfg80211: failed to load regulatory.db
[   72.026748] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   73.027039] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   74.027159] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   75.027109] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   76.027461] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   77.027391] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!
[   78.027560] NOHZ tick-stop error: Non-RCU local softirq work is
pending, handler #08!!!

This happens on all kernel versions from 5.10  to 5.13.

Any ideas on how to fix this problem?

Thanks,

Fabio Estevam