diff options
| author |   Ben Chan <benchan@chromium.org> | 2014-03-19 14:00:06 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-03-20 16:57:35 -0400 |
| commit | 259fef033ffe4e70bf7f358c53400a09f1b5384e (patch) | |
| tree | 2c972b7f21f84be2ea4ba8afa319ffc700f2ccf1 /include | |
| parent | USB: cdc: add MBIM extended functional descriptor structure (diff) | |
| download | linux-dev-259fef033ffe4e70bf7f358c53400a09f1b5384e.tar.xz linux-dev-259fef033ffe4e70bf7f358c53400a09f1b5384e.zip | |
net: cdc_ncm: respect operator preferred MTU reported by MBIM
According to "Universal Serial Bus Communications Class Subclass
Specification for Mobile Broadband Interface Model, Revision 1.0,
Errata-1" published by USB-IF, the wMTU field of the MBIM extended
functional descriptor indicates the operator preferred MTU for IP data
streams.
This patch modifies cdc_ncm_setup to ensure that the MTU value set on
the usbnet device does not exceed the operator preferred MTU indicated
by wMTU if the MBIM device exposes a MBIM extended functional
descriptor.
Signed-off-by: Ben Chan <benchan@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/cdc_ncm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h index c3fa80745996..bdf05fb36729 100644 --- a/include/linux/usb/cdc_ncm.h +++ b/include/linux/usb/cdc_ncm.h @@ -93,6 +93,7 @@ struct cdc_ncm_ctx { const struct usb_cdc_ncm_desc *func_desc; const struct usb_cdc_mbim_desc *mbim_desc; + const struct usb_cdc_mbim_extended_desc *mbim_extended_desc; const struct usb_cdc_ether_desc *ether_desc; struct usb_interface *control; |