[Bug 2127044] Re: MT7925 wifi is hard blocked on HP's machine

Still got hard blocked even roll back to 2.21 firmware.

ubuntu@localhost:~$ uname -a
Linux localhost 6.14.0-1018-oem #18-Ubuntu SMP PREEMPT_DYNAMIC Wed Dec 10 09:33:29 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
ubuntu@localhost:~$ rfkill list
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
ubuntu@localhost:~$ dpkg -l | grep linux-firmware
ii linux-firmware 20240318.git3b128b60-0ubuntu2.21 amd64 Firmware for Linux kernel drivers

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https://bugs.launchpad.net/bugs/2127044

Title:
MT7925 wifi is hard blocked on HP's machine

Status in HWE Next:
New
Status in linux package in Ubuntu:
Invalid
Status in linux-firmware package in Ubuntu:
Invalid
Status in linux-oem-6.14 package in Ubuntu:
Invalid
Status in linux-oem-6.17 package in Ubuntu:
Invalid
Status in linux source package in Noble:
Invalid
Status in linux-firmware source package in Noble:
In Progress
Status in linux-oem-6.14 source package in Noble:
Fix Released
Status in linux-oem-6.17 source package in Noble:
In Progress
Status in linux source package in Questing:
In Progress
Status in linux-firmware source package in Questing:
In Progress
Status in linux-oem-6.14 source package in Questing:
Invalid
Status in linux-oem-6.17 source package in Questing:
Invalid

Bug description:
[Impact]
The wifi is hard blocked and can't be used randomly.

[Fix]
The issue is introduced by commit 085749115fd37 ("wifi: mt76: mt7925: add rfkill_poll for hardware rfkill")
The machine doesn't support this feature may lead to undefined behavior, and MTK will submit a firmware to fix this issue in the near feature.

For short-term solution, we made a DMI quick to list the machines that
doesn't support this feature.

[Test]
1. Boot up HP Z2 Mini G1a Workstation
2. Run `rfkill list` to check wlan0 block state
3. Re-plug power cord and then check rfkill state again
4. The wlan0 should not be hard blocked.

[Where problems could occur]
Should be pretty safe to return the function call directly, since the machine doesn't support it.

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