RE: [PATCH rtw-next 2/2] wifi: rtw88: pci: warn when a TX ring stops advancing

[Ping-Ke Shih]

Abdurrahman Karadag <abdurrahmankaradag19@xxxxxxxxx> wrote:
> On RTL8821CE the hardware read index of a TX ring can stop moving while
> the driver keeps submitting descriptors. The link stays associated and
> RX keeps working, so from userspace this is a dead network with no
> explanation: ping and curl report 100% loss and nothing appears in the
> log.
> 
> A watchdog dumping the TXBD registers caught five of these across three
> boots, all with station power save off and REG_TXPAUSE at 0x00. 

As you mentioned, REG_TXPAUSE at 0xff sometimes. I think it will be 
a right direction to dig why it becomes 0xff. Then, we don't need
a watchdog to detect the status periodically.