USB: quirks: Ignore duplicate endpoint on Sound Devices MixPre-D
authorAlan Stern <stern@rowland.harvard.edu>
Wed, 26 Aug 2020 19:46:24 +0000 (15:46 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 27 Aug 2020 07:24:05 +0000 (09:24 +0200)
commit068834a2773b6a12805105cfadbb3d4229fc6e0a
tree8289576a6ad36ac34301429905329ae34d972fc3
parent23e26d0577535f5ffe4ff8ed6d06e009553c0bca
USB: quirks: Ignore duplicate endpoint on Sound Devices MixPre-D

The Sound Devices MixPre-D audio card suffers from the same defect
as the Sound Devices USBPre2: an endpoint shared between a normal
audio interface and a vendor-specific interface, in violation of the
USB spec.  Since the USB core now treats duplicated endpoints as bugs
and ignores them, the audio endpoint isn't available and the card
can't be used for audio capture.

Along the same lines as commit bdd1b147b802 ("USB: quirks: blacklist
duplicate ep on Sound Devices USBPre2"), this patch adds a quirks
entry saying to ignore ep5in for interface 1, leaving it available for
use with standard audio interface 2.

Reported-and-tested-by: Jean-Christophe Barnoud <jcbarnoud@gmail.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Fixes: 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
Link: https://lore.kernel.org/r/20200826194624.GA412633@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/core/quirks.c