Module Name: src
Committed By: mrg
Date: Sat Apr 27 01:23:26 UTC 2019
Modified Files:
src/sys/dev/usb: uchcom.c
Log Message:
fix uchcom(4) detach, like umodem(4) recently:
- use static normally in umodem_common.c
- add sc_refcnt, sc_lock and sc_detach_cv to softc. usage is:
- sc_dying is protected by sc_lock
- sc_detach_cv is matched with sc_lock for cv operations
- sc_refcnt is increased in open and decreased in close, any time
it is decreased, it is checked for less than zero, and a broadcast
performed on sc_detach_cv. detach waits for sc_refcnt
- uchcom_param() and uchcom_set() check for sc_dying
this fixes pullout out an open ucom@uchcom.
XXX: pullup
To generate a diff of this commit:
cvs rdiff -u -r1.28 -r1.29 src/sys/dev/usb/uchcom.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
