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From: CaTaTo <vahnenko2003@gmail.com>
To: gregkh@linuxfoundation.org
Cc: linux-usb@vger.kernel.org, vahnenko2003@gmail.com
Subject: Re: ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed
Date: Fri, 13 Mar 2026 12:54:35 +0300	[thread overview]
Message-ID: <11a5fd78-b897-47ca-8747-6f362d327b30@gmail.com> (raw)
In-Reply-To: <2026031331-overrun-palpitate-71c4@gregkh>

[-- Attachment #1: Type: text/plain, Size: 177 bytes --]

Sorry again, last message went probably to Greg's address rather than 
this topic. I managed to make a patch, hopefully I didn't miss anything 
critical.

Regards,

Vyacheslav

[-- Attachment #2: 0001-Add-USB_QUIRK_NO_BOS-for-ezcap401-usb-capture-card.patch --]
[-- Type: text/x-patch, Size: 897 bytes --]

From 1ad243ebd0211a591665383d1382615bb9e3dc3a Mon Sep 17 00:00:00 2001
From: Vyacheslav Vahnenko <vahnenko2003@gmail.com>
Date: Fri, 13 Mar 2026 12:12:26 +0300
Subject: [PATCH] Add USB_QUIRK_NO_BOS for ezcap401 usb capture card

Signed-off-by: Vyacheslav Vahnenko <vahnenko2003@gmail.com>
---
 drivers/usb/core/quirks.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 9e7e49712..8ef876315 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -583,6 +583,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* INTEL VALUE SSD */
 	{ USB_DEVICE(0x8086, 0xf1a5), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* ezcap401 - BOS descriptor fetch hangs at SuperSpeed Plus */
+	{ USB_DEVICE(0x32ed, 0x0401), .driver_info = USB_QUIRK_NO_BOS },
+
 	{ }  /* terminating entry must be last */
 };
 
-- 
2.53.0


  reply	other threads:[~2026-03-13  9:54 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-12 18:10 ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed CaTaTo
2026-03-13  7:08 ` Greg KH
2026-03-13  9:54   ` CaTaTo [this message]
2026-03-13 10:11     ` Greg KH
2026-03-13 11:01       ` Vyacheslav Vahnenko
2026-03-13 12:04         ` Greg KH
2026-03-13 12:36           ` ezcap401 needs USB_QUIRK_NO_BOS to function on 10gbs usb speed Vyacheslav Vahnenko
2026-03-13 17:20             ` Greg KH

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