# Re: \[PATCH 2/2\] USB CDC NCM errata updates for cdc\_ncm host driver

- From: Greg Lee \<hidden\>
- Date: 2011-02-09 05:25:48 
- List: netdev
- Page: https://ratatoskr.run/netdev/2011/02/10863812
- Thread: https://ratatoskr.run/netdev/2011/02/10863812/t.md

```text
On Mon, Feb 7, 2011 at 2:45 PM, Alexey Orishko [ref] wrote:
>
> Specification links:
> - CDC NCM errata link:
>  http://www.usb.org/developers/devclass_docs/NCM10_012011.zip
> - CDC and WMC errata link:
>  http://www.usb.org/developers/devclass_docs/CDC1.2_WMC1.1_012011.zip
>
> Changes:
> - driver updated to match cdc.h header with errata changes
> - added support for USB_CDC_SET_NTB_INPUT_SIZE control request with
>  8 byte length
> - fixes to comply with specification: send only control requests supported by
>  device, set number of datagrams for IN direction, connection speed structure
>  update, etc.
> - packet loss fixed for tx direction; misleading flag renamed.
> - adjusted hard_mtu value.
>
> Signed-off-by: Alexey Orishko <redacted>

Alexey (and others), are you aware of any commercially available
devices that implement NCM that we can test with?

Greg
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```