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Subject[PATCH net-next v4 0/2] adjust MTU as indicated by MBIM extended functional descriptor
The MBIM extended functional descriptor, defined in "Universal Serial Bus
Communications Class Subclass Specification for Mobile Broadband Interface
Model, Revision 1.0, Errata-1" by USB-IF, indicates the operator preferred MTU
value via a wMTU field.

This patch set ensures that the initial MTU value set by cdc_ncm on a MBIM net
device does not exceed the wMTU value, provided the MBIM device exposes a MBIM
extended functional descriptor.

* Changelog
v2: Fixed a le16_to_cpu conversion issue in patch 2/2 pointed out by
Bjørn Mork <>
v3: No code changes. Resubmitted to include patch 1/2 as suggested by
David Miller <>
v4: No code changes. Resubmitted as suggested by David Miller:
- Added a summary of the patch set
- Carried the ACK from Greg Kroah-Hartman <>
- Added a specified the tree (net-next) to apply the patch set to

Ben Chan (2):
USB: cdc: add MBIM extended functional descriptor structure
net: cdc_ncm: respect operator preferred MTU reported by MBIM

drivers/net/usb/cdc_ncm.c | 17 +++++++++++++++++
include/linux/usb/cdc_ncm.h | 1 +
include/uapi/linux/usb/cdc.h | 12 ++++++++++++
3 files changed, 30 insertions(+)


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