CVS commit: src/sys/dev/usb

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Sat Aug 20 14:06:21 UTC 2022

Modified Files:
        src/sys/dev/usb: usbnet.c

Log Message:
usbnet(9): Split unp_stopping into stopped/txstopped/rxstopped.

In practical terms this could be done with one variable and an atomic
store, but serializing all access with a lock makes reasoning easier,
and the locks have to be taken by the logic that queries the
variables anyway, and the variables are set only under heavy-weight
configuration changes anyway.

What this accomplishes is disentangling lock order between rxlock and
txlock: they are never taken at the same time, so no order is needed.

I renamed unp_stopping to unp_stopped for a compiler-assisted audit
to make sure I reviewed every case of it.


To generate a diff of this commit:
cvs rdiff -u -r1.101 -r1.102 src/sys/dev/usb/usbnet.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.