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If you insert a pccard modem and then eject it, you get a panic. This

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happens because the sio device was never opened and com->tp is
therefore NULL.  ttygone can't swallow a NULL, so guard against that
possibility.  Other places in this function make similar checks, so I
believe this is correct.
This commit is contained in:
Warner Losh 2004-07-22 23:16:12 +00:00
parent 0cfc058a42
commit a7092dac2e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=132561
1 changed files with 2 additions and 1 deletions
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3
sys/dev/sio/sio.c
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@ -454,7 +454,8 @@ siodetach(dev)
return (0);
}
com->gone = TRUE;
ttygone(com->tp);
if (com->tp)
ttygone(com->tp);
for (i = 0 ; i < 6; i++)
destroy_dev(com->devs[i]);
if (com->irqres) {