Date: Sun, 15 Aug 2010 16:10:05 GMT From: Ed Schouten <ed@80386.nl> To: freebsd-usb@FreeBSD.org Subject: Re: usb/149675: uftdi doesn't react to break properly Message-ID: <201008151610.o7FGA5rE008529@freefall.freebsd.org>
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The following reply was made to PR usb/149675; it has been noted by GNATS.
From: Ed Schouten <ed@80386.nl>
To: bug-followup@FreeBSD.org, prt@prt.org, hselasky@c2i.net
Cc:
Subject: Re: usb/149675: uftdi doesn't react to break properly
Date: Sun, 15 Aug 2010 18:02:40 +0200
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Hans, Paul,
I just looked at the usb_serial.c source code and it seems break/parity
conditions are never propagated to the TTY layer:
if (ttydisc_rint(tp, buf[cnt], 0) =3D=3D -1) {
The third argument is supposed to be a bitmask of TRE_FRAMING,
TRE_PARITY, TRE_OVERRUN and TRE_BREAK, to indicate the type of
transmission error/condition.
This is why breaks are probably just received as zero-bytes.
--=20
Ed Schouten <ed@80386.nl>
WWW: http://80386.nl/
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