[PATCH v4 0/2] usb: core: 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):
  usb: core: Add quirk for 255-bytes initial config read
  usb: hub: Split announce_device() to log device identity before
    enumeration

Changes in v4:
- Reworded comments and messages
- Moved the memcpy() block that skips the second read after USB_QUIRK_DELAY_INIT

 .../admin-guide/kernel-parameters.txt         |  5 +++
 drivers/usb/core/config.c                     | 32 ++++++++++++++-----
 drivers/usb/core/hub.c                        | 16 +++++++---
 drivers/usb/core/quirks.c                     |  4 +++
 include/linux/usb/quirks.h                    |  3 ++
 5 files changed, 48 insertions(+), 12 deletions(-)

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2.54.0