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Fix the panic occuring on non-changer devices.

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This commit is contained in:
Søren Schmidt 2000-03-24 07:44:20 +00:00
parent 464699d858
commit 8c918526a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=58527
1 changed files with 3 additions and 3 deletions
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6
sys/dev/ata/atapi-cd.c
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@ -494,7 +494,7 @@ acdopen(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
return EBUSY;
}
if (count_dev(dev) == 1) {
if (cdp->slot != cdp->changer_info->current_slot) {
if (cdp->changer_info && cdp->slot != cdp->changer_info->current_slot) {
acd_select_slot(cdp);
tsleep(&cdp->changer_info, PRIBIO, "acdopn", 0);
}
@ -515,7 +515,7 @@ acdclose(dev_t dev, int32_t flags, int32_t fmt, struct proc *p)
struct acd_softc *cdp = dev->si_drv1;
if (count_dev(dev) == 1) {
if (cdp->slot != cdp->changer_info->current_slot) {
if (cdp->changer_info && cdp->slot != cdp->changer_info->current_slot) {
acd_select_slot(cdp);
tsleep(&cdp->changer_info, PRIBIO, "acdclo", 0);
}
@ -531,7 +531,7 @@ acdioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flags, struct proc *p)
struct acd_softc *cdp = dev->si_drv1;
int32_t error = 0;
if (cdp->slot != cdp->changer_info->current_slot) {
if (cdp->changer_info && cdp->slot != cdp->changer_info->current_slot) {
acd_select_slot(cdp);
tsleep(&cdp->changer_info, PRIBIO, "acdctl", 0);
}