On 27/05/2024 20:34, Marcin Ślusarz wrote: > From: Marcin Ślusarz <mslusarz@xxxxxxxxx> > > If I don't connect to any Wifi network, after around 10 minutes, the device > hangs with endless spamming of: > rtw_8821cu 1-1:1.2: rtw_usb_reg_sec: reg 0x4e0, usb write 1 fail, status: -71 > killing both Wifi and Bluetooth part of the device. > > On arm, just leaving the wifi device unconnected kills it in up to 20 minutes. > If I keep restarting wpa_supplicant I can trigger it within a minute. > Looping "ifconfig wlan0 down; ifconfig wlan0 up" also triggers it within a minute. > > On x86_64 system the only way I could trigger this was via ifconfig loop, > but it took 3 hours and 20 minutes to do it. > > The only thing that can "fix" the device is replugging it. > > I found out that the reason for those hangs is a power-off+on sequence that's > triggered by the above steps. > > Disabling power-off for that chip "fixes" the issue. The patches below > implement that, but I'm not seriously proposing them for merging. > > Marcin Ślusarz (2): > wifi: rtw88: use RTW_FLAG_RUNNING for deciding whether to enter/leave > IPS > wifi: rtw88: disable power offs for 8821C > > drivers/net/wireless/realtek/rtw88/main.c | 14 ++++++++------ > drivers/net/wireless/realtek/rtw88/ps.c | 4 ++-- > 2 files changed, 10 insertions(+), 8 deletions(-) > The first patch alone doesn't fix it?
