Source: linux Version: 6.12.63-1 Severity: important Tags: upstream The recently released trixie stable update contains change: wifi: rtw88: sdio: use indirect IO for device registers before power-on (linux stable commit bc1ca06998c1cb6d58e02e0f28c032ec88eb45dd)
This regresses and kills my wifi. The following linux-stable v6.12.64 already has the fix with a description of the bug that I am experiencing: commit 1f8ae2e99a9df11a7951d972c119a2f0d3a41a6a Author: Ping-Ke Shih <[email protected]> Date: Tue Nov 25 09:38:49 2025 +0800 wifi: rtw88: limit indirect IO under powered off for RTL8822CS [ Upstream commit f3ccdfda345ca9a624ea425840a926b8338c1e25 ] The indirect IO is necessary for RTL8822CS, but not necessary for other chips. Otherwiese, it throws errors and becomes unusable. rtw88_8723cs mmc1:0001:1: WOW Firmware version 11.0.0, H2C version 0 rtw88_8723cs mmc1:0001:1: Firmware version 11.0.0, H2C version 0 rtw88_8723cs mmc1:0001:1: sdio read32 failed (0xf0): -110 rtw88_8723cs mmc1:0001:1: sdio write8 failed (0x1c): -110 rtw88_8723cs mmc1:0001:1: sdio read32 failed (0xf0): -110 By vendor driver, only RTL8822CS and RTL8822ES need indirect IO, but RTL8822ES isn't supported yet. Therefore, limit it to RTL8822CS only. Reported-by: Andrey Skvortsov <[email protected]> Closes: https://lore.kernel.org/linux-wireless/[email protected]/T/#m997b4522f7209ba629561c776bfd1d13a b24c1d4 Fixes: 58de1f91e033 ("wifi: rtw88: sdio: use indirect IO for device registers before power-on") Signed-off-by: Ping-Ke Shih <[email protected]> Tested-by: Andrey Skvortsov <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Sasha Levin <[email protected]> Please upload a stable update as soon as possible.
