Author: hselasky
Date: Mon Aug 15 09:03:05 2016
New Revision: 304129
URL: https://svnweb.freebsd.org/changeset/base/304129
Log:
MFC r303765:
Keep a reference count on USB keyboard polling to allow recursive
cngrab() during a panic for example, similar to what the AT-keyboard
driver is doing.
Found by: Bruce Evans <b...@optusnet.com.au>
Modified:
stable/9/sys/dev/usb/input/ukbd.c
Directory Properties:
stable/9/sys/ (props changed)
stable/9/sys/dev/ (props changed)
Modified: stable/9/sys/dev/usb/input/ukbd.c
==============================================================================
--- stable/9/sys/dev/usb/input/ukbd.c Mon Aug 15 09:02:09 2016
(r304128)
+++ stable/9/sys/dev/usb/input/ukbd.c Mon Aug 15 09:03:05 2016
(r304129)
@@ -197,6 +197,7 @@ struct ukbd_softc {
int sc_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */
int sc_state; /* shift/lock key state */
int sc_accents; /* accent key index (> 0) */
+ int sc_polling; /* polling recursion count */
int sc_led_size;
int sc_kbd_size;
@@ -1967,7 +1968,16 @@ ukbd_poll(keyboard_t *kbd, int on)
struct ukbd_softc *sc = kbd->kb_data;
UKBD_LOCK();
- if (on) {
+ /*
+ * Keep a reference count on polling to allow recursive
+ * cngrab() during a panic for example.
+ */
+ if (on)
+ sc->sc_polling++;
+ else
+ sc->sc_polling--;
+
+ if (sc->sc_polling != 0) {
sc->sc_flags |= UKBD_FLAG_POLLING;
sc->sc_poll_thread = curthread;
} else {
_______________________________________________
svn-src-stable-9@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-stable-9
To unsubscribe, send any mail to "svn-src-stable-9-unsubscr...@freebsd.org"
