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Bug#1120680: linux-image-6.1.0-41-amd64: After updating to this kernel image linux-image-6.1.0-41-amd64 my Atheros QCA986x/988x did not work.

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Package: linux-image-6.1.0-41-amd64
Severity: important

Dear Maintainer,

   * What led up to the situation?
   Installing linux-image-6.1.0-41-amd64

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

   Installing linux-image-6.1.0-41-amd64 and reeboting broke my wifi

   * What was the outcome of this action?

   After updating to this kernel image linux-image-6.1.0-41-amd64 my wifi cards disappeared
   and my two hostapd instances (2,4GHz and 5GHz) of my router and access point did not start.

   * What outcome did you expect instead?
   that the wifi cards and hostapd instances work as with previous kernel linux-image-6.1.0-40-amd64.
   After checking the latest commits to drivers/net/wireless of kernel.org and cherrypicking
   and applying to my 6.1.158 kernel source (same version as for linux-image-6.1.0-41-amd64)
   I was able to build a kernel that worked again. The commit is:

From 2469bb6a6af944755a7d7daf66be90f3b8decbf9 Mon Sep 17 00:00:00 2001
From: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Date: Mon, 27 Oct 2025 09:49:12 +0800
Subject: Revert "wifi: ath10k: avoid unnecessary wait for service ready
 message"

This reverts commit 51a73f1b2e56b0324b4a3bb8cebc4221b5be4c7a.

Although this commit benefits QCA6174, it breaks QCA988x and
QCA9984 [1][2]. Since it is not likely to root cause/fix this
issue in a short time, revert it to get those chips back.

Compile tested only.   

   
-- System Information:
Debian Release: 12.11
merged-usr: no
Architecture: amd64 (x86_64)

Kernel: Linux 6.1.158-custom (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

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Bug#1120680: linux-image-6.1.0-41-amd64: After updating to this kernel image linux-image-6.1.0-41-amd64 my Atheros QCA986x/988x did not work. Tito Ragusa <tauromenion@gmail.com> - 2025-11-14 15:40 +0100

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