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From: Hans Petter Selasky <hselasky@FreeBSD.org>
Date: Thu, 14 Oct 2010 21:45:41 +0000 (UTC)
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Subject: svn commit: r213872 - head/sys/dev/usb/serial
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Author: hselasky
Date: Thu Oct 14 21:45:41 2010
New Revision: 213872
URL: http://svn.freebsd.org/changeset/base/213872

Log:
  Fix forwarding of Line Register Status changes to TTY layer.
  
  PR: usb/149675
  Approved by:    thompsa (mentor)

Modified:
  head/sys/dev/usb/serial/usb_serial.c

Modified: head/sys/dev/usb/serial/usb_serial.c
==============================================================================
--- head/sys/dev/usb/serial/usb_serial.c	Thu Oct 14 21:41:08 2010	(r213871)
+++ head/sys/dev/usb/serial/usb_serial.c	Thu Oct 14 21:45:41 2010	(r213872)
@@ -942,6 +942,7 @@ ucom_cfg_status_change(struct usb_proc_m
 	uint8_t new_msr;
 	uint8_t new_lsr;
 	uint8_t onoff;
+	uint8_t lsr_delta;
 
 	tp = sc->sc_tty;
 
@@ -965,6 +966,7 @@ ucom_cfg_status_change(struct usb_proc_m
 		return;
 	}
 	onoff = ((sc->sc_msr ^ new_msr) & SER_DCD);
+	lsr_delta = (sc->sc_lsr ^ new_lsr);
 
 	sc->sc_msr = new_msr;
 	sc->sc_lsr = new_lsr;
@@ -977,6 +979,30 @@ ucom_cfg_status_change(struct usb_proc_m
 
 		ttydisc_modem(tp, onoff);
 	}
+
+	if ((lsr_delta & ULSR_BI) && (sc->sc_lsr & ULSR_BI)) {
+
+		DPRINTF("BREAK detected\n");
+
+		ttydisc_rint(tp, 0, TRE_BREAK);
+		ttydisc_rint_done(tp);
+	}
+
+	if ((lsr_delta & ULSR_FE) && (sc->sc_lsr & ULSR_FE)) {
+
+		DPRINTF("Frame error detected\n");
+
+		ttydisc_rint(tp, 0, TRE_FRAMING);
+		ttydisc_rint_done(tp);
+	}
+
+	if ((lsr_delta & ULSR_PE) && (sc->sc_lsr & ULSR_PE)) {
+
+		DPRINTF("Parity error detected\n");
+
+		ttydisc_rint(tp, 0, TRE_PARITY);
+		ttydisc_rint_done(tp);
+	}
 }
 
 void