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Fix PIC lookup by device and xref. There was not taken into account

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the situation that someone has a pointer to device but not its xref.
This situation is regular now, after r297539.
This commit is contained in:
Svatopluk Kraus 2016-04-06 12:48:45 +00:00
parent ab83575070
commit 4be58cba48
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=297614
1 changed files with 16 additions and 8 deletions
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24
sys/kern/subr_intr.c
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@ -766,11 +766,19 @@ pic_lookup_locked(device_t dev, intptr_t xref)
mtx_assert(&pic_list_lock, MA_OWNED);
if (dev == NULL && xref == 0)
return (NULL);
/* Note that pic->pic_dev is never NULL on registered PIC. */
SLIST_FOREACH(pic, &pic_list, pic_next) {
if (pic->pic_xref != xref)
continue;
if (pic->pic_xref != 0 || pic->pic_dev == dev)
return (pic);
if (dev == NULL) {
if (xref == pic->pic_xref)
return (pic);
} else if (xref == 0 || pic->pic_xref == 0) {
if (dev == pic->pic_dev)
return (pic);
} else if (xref == pic->pic_xref && dev == pic->pic_dev)
return (pic);
}
return (NULL);
}
@ -840,14 +848,14 @@ intr_pic_register(device_t dev, intptr_t xref)
{
struct intr_pic *pic;
if (dev == NULL)
return (EINVAL);
pic = pic_create(dev, xref);
if (pic == NULL)
return (ENOMEM);
if (pic->pic_dev != dev)
return (EINVAL); /* XXX it could be many things. */
debugf("PIC %p registered for %s <xref %x>\n", pic,
device_get_nameunit(dev), xref);
debugf("PIC %p registered for %s <dev %p, xref %x>\n", pic,
device_get_nameunit(dev), dev, xref);
return (0);
}