diff options
| author | hm <hm@FreeBSD.org> | 2001-05-21 09:24:48 +0000 |
|---|---|---|
| committer | hm <hm@FreeBSD.org> | 2001-05-21 09:24:48 +0000 |
| commit | 39cf58d369279eaf1d11a706f174fdb98fb245e8 (patch) | |
| tree | 50a138469c2f31692107f5798e4fa928d0a0512c /sys/i4b/driver | |
| parent | c65c10ec83e1ab12358a1571f7f75953c4dfe8ee (diff) | |
| download | FreeBSD-src-39cf58d369279eaf1d11a706f174fdb98fb245e8.zip FreeBSD-src-39cf58d369279eaf1d11a706f174fdb98fb245e8.tar.gz | |
Submitted by: Juha-Matti Liukkonen, Cubical Solutions Ltd (jml@cubical.fi)
Reviewed by: hm
Bug in i4btel driver read routine corrected. The conditions in the
while() clause caused the receive queue to be referenced before checking
if a channel is connected, leading to kernel panic (do a 'dd
if=/dev/i4btel0 of=/dev/null' on an unconnected tel device, panic will
follow). Correction was to reorder the while clause conditions to check
for connectedness first.
Diffstat (limited to 'sys/i4b/driver')
| -rw-r--r-- | sys/i4b/driver/i4b_tel.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/sys/i4b/driver/i4b_tel.c b/sys/i4b/driver/i4b_tel.c index 48ddb55..2b6115b 100644 --- a/sys/i4b/driver/i4b_tel.c +++ b/sys/i4b/driver/i4b_tel.c @@ -29,7 +29,7 @@ * * $FreeBSD$ * - * last edit-date: [Fri Jan 12 14:52:05 2001] + * last edit-date: [Tue May 8 10:19:36 2001] * *---------------------------------------------------------------------------*/ @@ -533,9 +533,9 @@ i4btelread(dev_t dev, struct uio *uio, int ioflag) s = splimp(); IF_LOCK(sc->isdn_linktab->rx_queue); - while(IF_QEMPTY(sc->isdn_linktab->rx_queue) && - (sc->devstate & ST_ISOPEN) && - (sc->devstate & ST_CONNECTED)) + while((sc->devstate & ST_ISOPEN) && + (sc->devstate & ST_CONNECTED) && + IF_QEMPTY(sc->isdn_linktab->rx_queue)) { sc->devstate |= ST_RDWAITDATA; |
