CVS commit: src/sys/dev/usb

["matthew green" <mrg%netbsd.org@localhost>]

Module Name:    src
Committed By:   mrg
Date:           Thu Aug 29 09:17:51 UTC 2019

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

Log Message:
fix a lock hang reported by sc.dying in PR#54495.

remove locking in usbnet_tick().  assume that all locking
needs are handled inside usbnet_tick_task(), which runs in
the usbtask thread.  ensure that usbnet private is valid
before using it.

also check NULL private pointer in usbnet_isdying().
all the other cases should never happen.


To generate a diff of this commit:
cvs rdiff -u -r1.24 -r1.25 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.