XPost: linux.debian.bugs.dist   
   From: carnil@debian.org   
      
   Control: tags -1 + confirmed fixed-upstream   
      
   On Sun, Jan 18, 2026 at 12:26:33AM +0100, Bastian Germann wrote:   
   > 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    
   > 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    
   >     Closes: https://lore.kernel.org/linux-wireless/07a32e2d6c7   
   4eb1bd9415b5a921a652@realtek.com/T/#m997b4522f7209ba629561c776bfd1d13a   
   > b24c1d4   
   >     Fixes: 58de1f91e033 ("wifi: rtw88: sdio: use indirect IO for device   
   registers before power-on")   
   >     Signed-off-by: Ping-Ke Shih    
   >     Tested-by: Andrey Skvortsov    
   >     Link: https://patch.msgid.link/1764034729-1251-1-git-send-   
   mail-pkshih@realtek.com   
   >     Signed-off-by: Sasha Levin    
   >   
   > Please upload a stable update as soon as possible.   
      
   Thanks for pinpointing the fix, it will be included in the next upload   
   we will peform.   
      
   Regards,   
   Salvatore   
      
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