Received-SPF: pass (google.com: domain of linux-bluetooth+bounces-4852-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
Message-ID: <2e2d43d5-8447-4e67-8fe6-c7e7f48e7997@molgen.mpg.de>
Date: Wed, 22 May 2024 06:19:19 +0200
Precedence: bulk
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: [PATCH v2] Patch for CYW4373 hci up fail issue
To: Nobuaki Tsunashima <nobuaki.tsunashima@infineon.com>
Cc: marcel@holtmann.org, luiz.dentz@gmail.com, linux-bluetooth@vger.kernel.org
References: <016dd2b28cd5435ba6f13b01d4da0d44@infineon.com>
 <48e9ba9c-1bc8-4086-b7da-31a7d78b2a16@molgen.mpg.de>
 <baa852ee646a40f9ae70c6793b838ea7@infineon.com>
Content-Language: en-US
From: Paul Menzel <pmenzel@molgen.mpg.de>
In-Reply-To: <baa852ee646a40f9ae70c6793b838ea7@infineon.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit

Dear Nobuaki,


Thank you for your reply.

Am 21.05.24 um 03:43 schrieb Nobuaki.Tsunashima@infineon.com:

>>> CYW4373 ROM FW has an issue that it claims LE_Read_Transmit_Power
>>> command as supported in a response of Read_Local_Supported_Command
>>> command but rejects the LE_Read_Transmit_Power command with "Unknown HCI Command" status.
>>> Due to the issue, Bluetooth driver of 5.15 and later kernel fails to hci up.
>>
>> Why not 5.14?
> 
> More precisely, there was no problem with 5.10 and the issue was firstly
> reported with 5.15. So, not sure for the interim versions. If the exact version
> the issue was firstly introduced is needed, I will take some effort for it.

As you have the test setup, and bisecting is normally very quick, it’d 
be great if you could pinpoint the commit causing the regression.

[…]


Kind regards,

Paul