FAILED: patch "[PATCH] USB: core: Fix regression in Hercules audio card" failed to apply to 5.4-stable tree

FAILED: patch "[PATCH] USB: core: Fix regression in Hercules audio card" failed to apply to 5.4-stable tree

[gregkh]

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 184eead057cc7e803558269babc1f2cfb9113ad1 Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Thu, 19 Nov 2020 12:00:40 -0500
Subject: [PATCH] USB: core: Fix regression in Hercules audio card

Commit 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
aimed to make the USB stack more reliable by detecting and skipping
over endpoints that are duplicated between interfaces.  This caused a
regression for a Hercules audio card (reported as Bugzilla #208357),
which contains such non-compliant duplications.  Although the
duplications are harmless, skipping the valid endpoints prevented the
device from working.

This patch fixes the regression by adding ENDPOINT_IGNORE quirks for
the Hercules card, telling the kernel to ignore the invalid duplicate
endpoints and thereby allowing the valid endpoints to be used as
intended.

Fixes: 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
CC: <stable@vger.kernel.org>
Reported-by: Alexander Chalikiopoulos <bugzilla.kernel.org@mrtoasted.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20201119170040.GA576844@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index f536ea9fe945..fad31ccd1fa8 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -348,6 +348,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Guillemot Webcam Hercules Dualpix Exchange*/
 	{ USB_DEVICE(0x06f8, 0x3005), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* Guillemot Hercules DJ Console audio card (BZ 208357) */
+	{ USB_DEVICE(0x06f8, 0xb000), .driver_info =
+			USB_QUIRK_ENDPOINT_IGNORE },
+
 	/* Midiman M-Audio Keystation 88es */
 	{ USB_DEVICE(0x0763, 0x0192), .driver_info = USB_QUIRK_RESET_RESUME },
 
@@ -525,6 +529,8 @@ static const struct usb_device_id usb_amd_resume_quirk_list[] = {
  * Matched for devices with USB_QUIRK_ENDPOINT_IGNORE.
  */
 static const struct usb_device_id usb_endpoint_ignore[] = {
+	{ USB_DEVICE_INTERFACE_NUMBER(0x06f8, 0xb000, 5), .driver_info = 0x01 },
+	{ USB_DEVICE_INTERFACE_NUMBER(0x06f8, 0xb000, 5), .driver_info = 0x81 },
 	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0202, 1), .driver_info = 0x85 },
 	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0208, 1), .driver_info = 0x85 },
 	{ }

Re: FAILED: patch "[PATCH] USB: core: Fix regression in Hercules audio card" failed to apply to 5.4-stable tree

[Sudip Mukherjee]

[-- Attachment #1: Type: text/plain, Size: 399 bytes --]

Hi Greg,

On Mon, Nov 30, 2020 at 09:32:43AM +0100, gregkh@linuxfoundation.org wrote:
> 
> The patch below does not apply to the 5.4-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@vger.kernel.org>.

Here is the backport. Will also apply to 4.19-stable.

--
Regards
Sudip

[-- Attachment #2: 0001-USB-core-Fix-regression-in-Hercules-audio-card.patch --]
[-- Type: text/x-diff, Size: 2659 bytes --]

From c70b96d62c5d9fd23b7bb0ba174efe45c0afd0e1 Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Thu, 19 Nov 2020 12:00:40 -0500
Subject: [PATCH] USB: core: Fix regression in Hercules audio card

commit 184eead057cc7e803558269babc1f2cfb9113ad1 upstream

Commit 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
aimed to make the USB stack more reliable by detecting and skipping
over endpoints that are duplicated between interfaces.  This caused a
regression for a Hercules audio card (reported as Bugzilla #208357),
which contains such non-compliant duplications.  Although the
duplications are harmless, skipping the valid endpoints prevented the
device from working.

This patch fixes the regression by adding ENDPOINT_IGNORE quirks for
the Hercules card, telling the kernel to ignore the invalid duplicate
endpoints and thereby allowing the valid endpoints to be used as
intended.

Fixes: 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
CC: <stable@vger.kernel.org>
Reported-by: Alexander Chalikiopoulos <bugzilla.kernel.org@mrtoasted.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20201119170040.GA576844@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[sudip: use usb_endpoint_blacklist and USB_QUIRK_ENDPOINT_BLACKLIST]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
---
 drivers/usb/core/quirks.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 0f80195d0109..b55c3a699fc6 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -348,6 +348,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Guillemot Webcam Hercules Dualpix Exchange*/
 	{ USB_DEVICE(0x06f8, 0x3005), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* Guillemot Hercules DJ Console audio card (BZ 208357) */
+	{ USB_DEVICE(0x06f8, 0xb000), .driver_info =
+			USB_QUIRK_ENDPOINT_BLACKLIST },
+
 	/* Midiman M-Audio Keystation 88es */
 	{ USB_DEVICE(0x0763, 0x0192), .driver_info = USB_QUIRK_RESET_RESUME },
 
@@ -525,6 +529,8 @@ static const struct usb_device_id usb_amd_resume_quirk_list[] = {
  * Matched for devices with USB_QUIRK_ENDPOINT_BLACKLIST.
  */
 static const struct usb_device_id usb_endpoint_blacklist[] = {
+	{ USB_DEVICE_INTERFACE_NUMBER(0x06f8, 0xb000, 5), .driver_info = 0x01 },
+	{ USB_DEVICE_INTERFACE_NUMBER(0x06f8, 0xb000, 5), .driver_info = 0x81 },
 	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0202, 1), .driver_info = 0x85 },
 	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0208, 1), .driver_info = 0x85 },
 	{ }
-- 
2.11.0