Date: Sat, 27 Dec 2003 14:21:40 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: dhee@myrealbox.com Cc: freebsd-current@freebsd.org Subject: Re: Serial driver problems with 5.2-current Message-ID: <20031227.142140.90125536.imp@bsdimp.com> In-Reply-To: <1072558219.78a8a760dhee@myrealbox.com> References: <1072558219.78a8a760dhee@myrealbox.com>
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Try this patch. It bails out more.
Index: sio.c
===================================================================
RCS file: /cache/ncvs/src/sys/dev/sio/sio.c,v
retrieving revision 1.416
diff -u -r1.416 sio.c
--- sio.c 17 Nov 2003 07:21:19 -0000 1.416
+++ sio.c 27 Dec 2003 21:16:50 -0000
@@ -1794,9 +1794,20 @@
}
}
line_status = inb(com->line_status_port);
-
+ if (line_status == 0xff) {
+ printf("sio%d: spouting nonsense -- disabled.\n",
+ com->unit);
+ com->gone = 1;
+ return;
+ }
/* input event? (check first to help avoid overruns) */
while (line_status & LSR_RCV_MASK) {
+ if (line_status == 0xff) {
+ printf("sio%d: linstatus bad -- disabled.\n",
+ com->unit);
+ com->gone = 1;
+ return;
+ }
/* break/unnattached error bits or real input? */
if (!(line_status & LSR_RXRDY))
recv_data = 0;
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