Re: Question about the definition of struct usb_hub
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 23 Aug 2007, jidong xiao wrote:
> Regarding...
>
> struct usb_hub {
> ...
> unsigned quiescing:1;
> unsigned activating:1;
> ...
> }
>
> both quiescing and activating are flags.
> my question is what's difference between quiescing and _in_activating?
During normal operation neither flag is set.
When quiescing, the driver doesn't submit any URBs. When activating,
the driver sends Get-Port-Status requests for every port. During
normal operation, the driver sends Get-Port-Status requests only for
ports which have experienced a status-change event.
Alan Stern
-------------------------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc.
Still grepping through log files to find problems? Stop.
Now Search log events and configuration files using AJAX and a browser.
Download your FREE copy of Splunk now >> http://get.splunk.com/
_______________________________________________
[email protected]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel