[PATCH 0/2] usbcore: Add quirk for 255-byte initial config read

[Nikhil Solanke]

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(-)

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2.55.0