linux-kernel - Re: [PATCH] usb-audio: Rate limit usb_set

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Date:   Fri, 21 Apr 2023 16:16:59 +0100
From:   Chris Down <chris@...isdown.name>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Subject: Re: [PATCH] usb-audio: Rate limit usb_set_interface error reporting

Takashi Iwai writes:
>Hrm, is "usb 3-7.1.4" really the USB audio device?  The previous
>errors like "Unable to submit urb #2..." are certainly for USB audio,
>and those are with "usb 3-7.4".

There are two USB audio devices -- 3-7.1.4 is input, 3-7.4 is output.

     % dmesg --notime | grep -e 'usb 3-7.4' -e 'usb 3-7.1.4' | grep Product: | sort | uniq
     usb 3-7.1.4: Product: USB2.0 Microphone
     usb 3-7.4: Product: USB Audio Device

Thanks,

Chris