From: Nikhil Solanke <nikhilsolanke5@gmail.com>
To: linux-usb@vger.kernel.org
Cc: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
stern@rowland.harvard.edu, michal.pecio@gmail.com,
corbet@lwn.net, skhan@linuxfoundation.org,
linux-doc@vger.kernel.org, stable@vger.kernel.org,
Nikhil Solanke <nikhilsolanke5@gmail.com>
Subject: [PATCH 0/2] usbcore: Add quirk for 255-byte initial config read
Date: Sat, 18 Jul 2026 01:23:34 +0530 [thread overview]
Message-ID: <20260717195336.98500-1-nikhilsolanke5@gmail.com> (raw)
This series adds a quirk for USB devices that fail enumeration when
the initial GET_DESCRIPTOR(CONFIGURATION) request uses wLength=9.
Patch 1 adds USB_QUIRK_WINDOWS_CONFIG_REQ_SIZE which causes
usb_get_configuration() to use wLength=255 for the initial config
descriptor request, mirroring long-standing Windows behavior.
Patch 2 splits announce_device() to log device identity before
enumeration, improving failure diagnosis.
Nikhil Solanke (2):
usbcore: Add quirk for 255-bytes initial config read
USB: hub: Split announce_device() to log device identity before
enumeration
.../admin-guide/kernel-parameters.txt | 10 +++++
drivers/usb/core/config.c | 39 +++++++++++++++----
drivers/usb/core/hub.c | 16 ++++++--
drivers/usb/core/quirks.c | 4 ++
include/linux/usb/quirks.h | 3 ++
5 files changed, 61 insertions(+), 11 deletions(-)
--
2.55.0
next reply other threads:[~2026-07-17 19:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-17 19:53 Nikhil Solanke [this message]
2026-07-17 19:53 ` [PATCH 1/2] usbcore: Add quirk for 255-bytes initial config read Nikhil Solanke
2026-07-17 19:53 ` [PATCH 2/2] USB: hub: Split announce_device() to log device identity before enumeration Nikhil Solanke
2026-07-18 5:30 ` [PATCH 0/2] usbcore: Add quirk for 255-byte initial config read Nikhil Solanke
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