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, 3 Sep 2020 09:29:47 +0000 (11:29 +0200)
commit7eb94ea0e8e9fc9062b0e6d4d131dac2b23a9799
treed8aa858e15f0e5ac98b68676c5e50807eda7db74
parent155288e45c8d406b707504cd2707b2cb3992f44b
USB: quirks: Ignore duplicate endpoint on Sound Devices MixPre-D

commit 068834a2773b6a12805105cfadbb3d4229fc6e0a upstream.

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