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Move mutex initialization from PCI probe to PCI attach. Drivers are not

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allowed to create any persistent state in their probe routine because it's
not guaranteed that they'll win the election and be allowed to attach.

Submitted by:	Matthew Macy
MFC after:	3 days
This commit is contained in:
scottl 2016-05-12 17:47:30 +00:00
parent 6d95624949
commit 1adf5af9a5
3 changed files with 13 additions and 23 deletions
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17
sys/dev/an/if_an.c
View File

@ -303,23 +303,6 @@ sysctl_an_cache_mode(SYSCTL_HANDLER_ARGS)
SYSCTL_PROC(_hw_an, OID_AUTO, an_cache_mode, CTLTYPE_STRING | CTLFLAG_RW,
0, sizeof(an_conf_cache), sysctl_an_cache_mode, "A", "");
/*
* Setup the lock for PCI attachment since it skips the an_probe
* function. We need to setup the lock in an_probe since some
* operations need the lock. So we might as well create the
* lock in the probe.
*/
int
an_pci_probe(device_t dev)
{
struct an_softc *sc = device_get_softc(dev);
mtx_init(&sc->an_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
return(0);
}
/*
* We probe for an Aironet 4500/4800 card by attempting to
* read the default SSID list. On reset, the first entry in

18
sys/dev/an/if_an_pci.c
View File

@ -119,16 +119,16 @@ static int
an_probe_pci(device_t dev)
{
struct an_type *t;
struct an_softc *sc = device_get_softc(dev);
uint16_t vid, did;
bzero(sc, sizeof(struct an_softc));
t = an_devs;
vid = pci_get_vendor(dev);
did = pci_get_device(dev);
while (t->an_name != NULL) {
if (pci_get_vendor(dev) == t->an_vid &&
pci_get_device(dev) == t->an_did) {
if (vid == t->an_vid &&
did == t->an_did) {
device_set_desc(dev, t->an_name);
an_pci_probe(dev);
return(BUS_PROBE_DEFAULT);
}
t++;
@ -145,8 +145,16 @@ an_attach_pci(dev)
int flags, error = 0;
sc = device_get_softc(dev);
bzero(sc, sizeof(struct an_softc));
flags = device_get_flags(dev);
/*
* Setup the lock in PCI attachment since it skips the an_probe
* function.
*/
mtx_init(&sc->an_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
if (pci_get_vendor(dev) == AIRONET_VENDORID &&
pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
sc->mpi350 = 1;

1
sys/dev/an/if_anreg.h
View File

@ -500,7 +500,6 @@ int an_alloc_port (device_t, int, int);
int an_alloc_memory (device_t, int, int);
int an_alloc_aux_memory (device_t, int, int);
int an_alloc_irq (device_t, int, int);
int an_pci_probe (device_t);
int an_probe (device_t);
int an_shutdown (device_t);
void an_resume (device_t);