The following reply was made to PR usb/113964; it has been noted by GNATS.
From: "M. Warner Losh" <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: usb/113964: [patch] ucom(4): kernel panic when dropping a
connection
Date: Sat, 23 Jun 2007 12:25:20 -0600 (MDT)
In message: <[EMAIL PROTECTED]>
Kazuaki ODA <[EMAIL PROTECTED]> writes:
: I don't know the proper fix but the following patch is workaround for
: me.
:
: --- ucom.c.patch begins here ---
: --- sys/dev/usb/ucom.c.orig 2007-06-22 23:45:37.000000000 +0900
: +++ sys/dev/usb/ucom.c 2007-06-23 17:47:18.000000000 +0900
: @@ -532,6 +532,9 @@
: if (sc->sc_dying)
: return;
:
: + if (sc->sc_oxfer == NULL)
: + return;
: +
: s = spltty();
:
: if (tp->t_state & TS_TBLOCK) {
: --- ucom.c.patch ends here ---
This is a good workaround. However, why does the tty->t_oproc get
called after the tty->t_close routine which sets sc->sc_oxfer to NULL?
Warner
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