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Calls the kernel_thread_w_arg( ) routine to create and start a
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kernel thread with timeshare scheduling. A kernel thread that is
created with timeshare scheduling means that its priority degrades if it
consumes an inordinate amount of CPU resources. Make sure that your
device driver calls kernel_thread_w_arg( ) only for long-running
tasks and always attaches a kernel thread to the first task.
The kernel_thread_w_arg( ) routine returns a pointer to the thread
data structure for the newly created thread. The device driver stores
this pointer in the autosense_thread member of the el_softc data
structure.
If the value that kernel_thread_w_arg( ) returns is NULL, then the
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thread could not be created. At this point, the el_probe( ) routine
must undo previous work and return a failure indication to the caller.
For PCMCIA versions of the card, unregisters the callback routine that
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was previously registered.
Deallocates the ether_driver data structure for this device.
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Frees up any memory that was allocated for enhanced hardware
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management and unregisters this card from the hardware management
database.
Calls the FREE macro, which frees the memory that was previously
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allocated for the el_softc data structure.
Returns the value 0 (zero) to indicate that the probe operation failed.
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5.1.10 Handling Subsequent Probe Operations
If the device had already been probed, the if_el device driver reads the
EEPROM to determine whether the hardware address has changed. The
following code shows how the el_probe( ) routine performs these tasks:
} else {
struct w3_eeprom ee_copy;
unsigned char tmp_addr[8];
struct ifreq ifr;
struct ifnet *ifp = &sc->is_if
if (multi_func_flag) {
bzero((caddr_t)&tuple_data, sizeof(struct tuple_data_info));
tuple_data_infop = &tuple_data;
tuple_infop = (struct tuple_info *)&tuple_data;
tuple_infop->socket = (short) card_infop->socket_vnum;
tuple_infop->attributes = 0;
tuple_infop->DesiredTuple = 0x88;
status = GetFirstTuple(tuple_infop);
if (status == SUCCESS) {
tuple_data_infop->TupleOffset = 0;
tuple_data_infop->TupleDataMax = (u_short)TUPLE_DATA_MAX;
status = GetTupleData(tuple_data_infop);
5–12 Implementing the Autoconfiguration Support Section (probe)
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