CVS commit: [netbsd-8] src/sys/dev/usb

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Mon Apr 22 08:17:50 UTC 2019

Modified Files:
        src/sys/dev/usb [netbsd-8]: ucom.c umodem_common.c umodemvar.h

Log Message:
Pull up following revision(s) (requested by mrg in ticket #1240):

        sys/dev/usb/umodem_common.c: revision 1.27
        sys/dev/usb/umodemvar.h: revision 1.10
        sys/dev/usb/ucom.c: revision 1.122

fix umodem(4) detach:

- ucom(4) needs kpreempt disabled around softint_schedule()
- switch a copied printf() to aprint_error_dev()
- use static normally in umodem_common.c
- remove unused sc_openings in softc, convert sc_dying to real bool
- 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.
- umodem_param() and umodem_set() check for sc_dying

this fixes pullout out an open ucom@umodem.

@skrll.

XXX: pullup


To generate a diff of this commit:
cvs rdiff -u -r1.118.8.2 -r1.118.8.3 src/sys/dev/usb/ucom.c
cvs rdiff -u -r1.25 -r1.25.8.1 src/sys/dev/usb/umodem_common.c
cvs rdiff -u -r1.9 -r1.9.10.1 src/sys/dev/usb/umodemvar.h

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