diff options
| author | peter <peter@FreeBSD.org> | 1996-07-26 13:47:38 +0000 |
|---|---|---|
| committer | peter <peter@FreeBSD.org> | 1996-07-26 13:47:38 +0000 |
| commit | 838c9e34b6ed0e9fa478da7cdbd98741cf2fe20f (patch) | |
| tree | bb02c50bf5eba2d6a6f4849e08c48c9334c4f1a0 /sys/dev/si | |
| parent | ee090854ff90b85b7a4edaee66f2fa9dc0ae4d73 (diff) | |
| download | FreeBSD-src-838c9e34b6ed0e9fa478da7cdbd98741cf2fe20f.zip FreeBSD-src-838c9e34b6ed0e9fa478da7cdbd98741cf2fe20f.tar.gz | |
Apply a bandaid to a problem elsewhere in the driver, when the process is
blocked in a write() while waiting for the output to drain, sleep only
for tp->t_timeout, not forever. This only seems to happen when there is
either a modem lockup holding the hardware flow control down, or due to
some problem in the driver with processes attempting to write after the
modem has hung up (eg: elm, tf).
Diffstat (limited to 'sys/dev/si')
| -rw-r--r-- | sys/dev/si/si.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/dev/si/si.c b/sys/dev/si/si.c index 71dcd53..650864f 100644 --- a/sys/dev/si/si.c +++ b/sys/dev/si/si.c @@ -30,7 +30,7 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHORS BE LIABLE. * - * $Id: si.c,v 1.46 1996/06/21 21:35:01 peter Exp $ + * $Id: si.c,v 1.47 1996/06/30 04:56:05 peter Exp $ */ #ifndef lint @@ -1059,8 +1059,11 @@ siwrite(dev, uio, flag) pp->sp_state |= SS_WAITWRITE; DPRINT((pp, DBG_WRITE, "in siwrite, wait for SS_BLOCKWRITE to clear\n")); if (error = ttysleep(tp, (caddr_t)pp, TTOPRI|PCATCH, - "siwrite", 0)) + "siwrite", tp->t_timeout)) { + if (error == ETIMEDOUT) + error = EIO; goto out; + } } error = (*linesw[tp->t_line].l_write)(tp, uio, flag); |
