d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

I _HATE_ crashes. The lptread() call needs to check LP_BYPASS, because

Browse Source 
if one tries to use read() on an LP_BYPASS'd dev_t, the softc will be
initialized mainly with NULLs, so...
This commit is contained in:
Brian Feldman 2000-03-15 03:23:04 +00:00
parent 7b12e51659
commit 3841bf81f7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=58082
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/dev/ppbus/lpt.c
View File

@ -695,6 +695,11 @@ lptread(dev_t dev, struct uio *uio, int ioflag)
device_t ppbus = device_get_parent(lptdev);
int error = 0, len;
if (sc->sc_flags & LP_BYPASS) {
/* we can't do reads in bypass mode */
return (EPERM);
}
if ((error = ppb_1284_negociate(ppbus, PPB_NIBBLE, 0)))
return (error);