linux-kernel - Re: [PATCH] usb: cdc-wdm: close race between read and workqueue

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Date: Mon, 15 Apr 2024 12:08:18 +0000
From: Aleksander Morgado <aleksandermj@...omium.org>
To: Oliver Neukum <oneukum@...e.com>, bjorn@...k.no
Cc: linux-usb@...r.kernel.org, gregkh@...uxfoundation.org,
 linux@...ck-us.net, linux-kernel@...r.kernel.org, ejcaruso@...omium.org
Subject: Re: [PATCH] usb: cdc-wdm: close race between read and workqueue

Hey Oliver,

>> Attached is an example output of mbimcli talking directly to the 
>> cdc-wdm port (i.e. without ModemManager or the mbim-proxy).
> 
> Could you provide a working example, that is with another chipset? And, 
> most important, dmesg for both cases with
> the log level set to maximum?
> 

Find attached a bunch of different logs. There are 3 cases tested:
  * FM101 (dmesg and mbimcli outputs), this shows the communication 
working in a QC based modem.
  * L850 (usbmon, dmesg and mbimcli outputs), this shows the break in 
the communication.
  * L850 with patch reverted (usbmon, dmesg and mbimcli outputs), this 
shows the communication working fine again.


Let me know if you need anything else.
Cheers!

-- 
Aleksander
View attachment "dmesg-fm101.txt" of type "text/plain" (1454 bytes)

View attachment "dmesg-l850.txt" of type "text/plain" (1949 bytes)

View attachment "dmesg-l850-patch-reverted.txt" of type "text/plain" (1040 bytes)

View attachment "mbimcli-fm101.txt" of type "text/plain" (18250 bytes)

View attachment "mbimcli-l850.txt" of type "text/plain" (9678 bytes)

View attachment "mbimcli-l850-patch-reverted.txt" of type "text/plain" (14345 bytes)

View attachment "usbmon-l850.txt" of type "text/plain" (22408 bytes)

View attachment "usbmon-l850-reverted.txt" of type "text/plain" (4783 bytes)