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References: <20240527173454.459264-1-marcin.slusarz@gmail.com> <9bfc8f01e99b43e485b2afc6ae4fd661@realtek.com>
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From: =?UTF-8?Q?Marcin_=C5=9Alusarz?= <marcin.slusarz@gmail.com>
Date: Tue, 28 May 2024 12:52:04 +0200
Message-ID: <CA+GA0_sQ_Bnp8CUq1Pmxf7zut1Kocaxbw4iXT4hYC5_ceXb7WQ@mail.gmail.com>
Subject: Re: wifi: rtw88: 8821CU hangs after some number of power-off/on cycles
To: Ping-Ke Shih <pkshih@realtek.com>
Cc: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>, =?UTF-8?Q?Marcin_=C5=9Alusarz?= <mslusarz@renau.com>
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wt., 28 maj 2024 o 05:52 Ping-Ke Shih <pkshih@realtek.com> napisa=C5=82(a):
>
> Marcin =C5=9Alusarz <marcin.slusarz@gmail.com> wrote:
> >
> > I found out that the reason for those hangs is a power-off+on sequence =
that's
> > triggered by the above steps.
>
> To avoid power-off/on sequence once device becomes idle, I would like to =
add
> a ips_disabled helper. Please revert your changes and apply my attached p=
atch.

My first attempt was very similar, and it fixed some cases but not all of t=
hem.

This is due to the existence of a second source of power-offs - rtw_ops_sto=
p,
which is called, e.g., on downing the interface (ifconfig wlan0 down).