Date: Sun, 22 Nov 1998 02:47:44 -0800 (PST) From: Bruce Evans <bde@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: cvs commit: src/sys/i386/isa sio.c Message-ID: <199811221047.CAA12089@freefall.freebsd.org>
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bde 1998/11/22 02:47:44 PST
Modified files:
sys/i386/isa sio.c
Log:
Deleted the workaround for lockup of certain (hopefully no longer used)
UARTs when their divisor latch registers are selected while they are
doing output. Waiting for (some) output to drain is not permitted for
the TCSANOW case of tcsetattr(). NIST-PCTS easily detects bugs like
this by testing at at speeds that no one would want to use (50 bps).
Deleted stale comments related to flushing i/o. Flushing works properly
for 16550s according to NIST-PCTS (it can't work properly for 16450s).
This finishes fixing all sio(16550)-related bugs found by NIST-PCTS.
Revision Changes Path
1.218 +1 -51 src/sys/i386/isa/sio.c
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