diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index 91938172912a..5dede66ea69e 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -849,6 +849,27 @@ static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev) return 0; } +/* + * A post configuration device descriptor read is needed to make the CM1A + * operational after reenumeration. + */ +static int snd_usb_cm1a_boot_quirk(struct usb_device *dev) +{ + struct usb_device_descriptor *desc __free(kfree) = kmalloc_obj(*desc); + int err; + + if (!desc) + return -ENOMEM; + + err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, sizeof(*desc)); + if (err < 0) { + dev_err(&dev->dev, "failed to read device descriptor: %d\n", err); + return err; + } + + return 0; +} + /* * Some sound cards from Native Instruments are in fact compliant to the USB * audio standard of version 2 and other approved USB standards, even though @@ -1681,6 +1702,8 @@ int snd_usb_apply_boot_quirk_once(struct usb_device *dev, switch (id) { case USB_ID(0x07fd, 0x0008): /* MOTU M Series, 1st hardware version */ return snd_usb_motu_m_series_boot_quirk(dev); + case USB_ID(0x1397, 0x1234): /* Behringer CM1A */ + return snd_usb_cm1a_boot_quirk(dev); } return 0;