Sender: Larry Finger <larry.finger@gmail.com>
Message-ID: <b4ced875-310f-8469-137f-7cee0c0ea336@lwfinger.net>
Date:   Fri, 17 Mar 2023 00:55:45 -0500
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Subject: Re: New binary rtw8852b_fw.bin not loading firmware not recognized
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To:     Kalle Valo <kvalo@kernel.org>, Ping-Ke Shih <pkshih@realtek.com>
Cc:     rb <rb0171610@gmail.com>,
        "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
References: <df1ce994-3368-a57e-7078-8bdcccf4a1fd@gmail.com>
 <386367223a2547669c60f7d1dcb42b40@realtek.com> <87a60cvu3v.fsf@kernel.org>
From:   Larry Finger <Larry.Finger@lwfinger.net>
In-Reply-To: <87a60cvu3v.fsf@kernel.org>
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On 3/17/23 00:12, Kalle Valo wrote:
> Ping-Ke Shih <pkshih@realtek.com> writes:
> 
>>> -----Original Message-----
>>> From: rb <rb0171610@gmail.com>
>>> Sent: Friday, March 17, 2023 6:48 AM
>>> To: linux-wireless@vger.kernel.org
>>> Subject: New binary rtw8852b_fw.bin not loading firmware not recognized
>>>
>>> Briefly,
>>>
>>> I use rtw89_8852be in kernel driver
>>>
>>> HARDWARE:
>>> Network controller [0280]: Realtek Semiconductor Co., Ltd. Device [10ec:b852]
>>>
>>> Lenovo Ideapad 1i
>>>
>>> ISSUE:
>>> Newest version of binary firmware 2023_03_10,
>>> rtw89/rtw8852b_fw.bin, will not load/firmware not recognized on Linux Kernel 6.2.5 (and others):
>>>
>>> [] loading firmare: rwt89/rtw8852b_fw.bin
>>> [] rtw89_8852be 0000:03:00.0: no suitable firmware found
>>> [] rtw89_8852be 0000:03:00.0: failed to recognize firmware
>>>
>>> Issue persists regardless of which 6.2 series kernel is used.
>>>
>>> All previous rwt89/rtw8852b_fw.bin firmware from linux-firmware 2023_02_10 and earlier loads and works
>>> correctly.
>>>
>>> I did file a bug report with the details:
>>>
>>> https://bugzilla.kernel.org/show_bug.cgi?id=217207
>>>
>>
>> The firmware format is changed, and wireless-next tree or upcoming 6.3 will
>> support it. I will also post this information on the bug.
> 
> We cannot break user space like that, linux-firmware needs to be
> backwards compatible. In other words, anything you submit to
> linux-firmware needs to work with old kernels. Should this new firmware
> be reverted from linux-firmware?
> 
> What about changes in the rtw89 driver? Do they still work with old
> firmware?

Kalle,

This is an unfortunate situation that I did not learn about until this week. As 
you have seen, my download site has the old firmware.

The latest driver will work with either version of the firmware.

Larry