linux-kernel - Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based RTL8821CS chipset

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Date:   Wed, 4 Jan 2023 21:06:41 +0100
From:   Felix Schwarz <felix.schwarz@....schwarz.eu>
To:     Bitterblue Smith <rtl8821cerfe2@...il.com>,
        Chris Morgan <macroalpha82@...il.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-wireless@...r.kernel.org,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-mmc@...r.kernel.org, Nitin Gupta <nitin.gupta981@...il.com>,
        Neo Jou <neojou@...il.com>, Pkshih <pkshih@...ltek.com>,
        Jernej Skrabec <jernej.skrabec@...il.com>
Subject: Re: [RFC PATCH v1 19/19] rtw88: Add support for the SDIO based
 RTL8821CS chipset


Am 04.01.23 um 20:59 schrieb Bitterblue Smith:
> The USB-based RTL8811CU also doesn't work, with suspiciously similar
> errors:
> 
> Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0: Firmware version 24.11.0, H2C version 12
> Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0 wlp0s20f0u2: renamed from wlan0
> Dec 25 21:43:40 home kernel: rtw_8821cu 1-2:1.0: read register 0x5 failed with -110
> Dec 25 21:43:41 home kernel: rtw_8821cu 1-2:1.0: read register 0x20 failed with -110
> Dec 25 21:44:11 home kernel: rtw_8821cu 1-2:1.0: write register 0x20 failed with -110
> Dec 25 21:44:12 home kernel: rtw_8821cu 1-2:1.0: read register 0x7c failed with -110
> Dec 25 21:44:43 home kernel: rtw_8821cu 1-2:1.0: write register 0x7c failed with -110
> Dec 25 21:44:44 home kernel: rtw_8821cu 1-2:1.0: read register 0x1080 failed with -110
> Dec 25 21:45:16 home kernel: rtw_8821cu 1-2:1.0: write register 0x1080 failed with -110

Same for me: I saw very similar read/write failures with my "Realtek 
Semiconductor Corp. 802.11ac NIC" (ID 0bda:c811) after applying Ping-Ke's patch 
for rfe 38 (see my message to linux-wireless on Dec 29).

Felix