Hi,
I found these routines in the kernel, does this means only one driver
can be matched to a device? What if two drivers both can drive the
device, like sd & sg in scsi subsystem?
static int device_attach(struct device * dev)
{
struct bus_type * bus = dev->bus;
struct list_head * entry;
int error;
if (dev->driver) {
device_bind_driver(dev);
return 1;
}
if (bus->match) {
list_for_each(entry, &bus->drivers.list) {
struct device_driver * drv = to_drv(entry);
error = bus_match(dev, drv);
if (!error)
/* success, driver matched */
return 1;
if (error != -ENODEV && error != -ENXIO)
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
drv->name, dev->bus_id, error);
}
}
return 0;
}
void driver_attach(struct device_driver * drv)
{
struct bus_type * bus = drv->bus;
struct list_head * entry;
int error;
if (!bus->match)
return;
list_for_each(entry, &bus->devices.list) {
struct device * dev = container_of(entry, struct device,
bus_list);
if (!dev->driver) {
error = bus_match(dev, drv);
if (error && (error != -ENODEV))
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
drv->name, dev->bus_id, error);
}
}
}
Thanks
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
