driver core: per-subsystem multithreaded probing

Make multithreaded probing work per subsystem instead of per driver.

It doesn't make much sense to probe the same device for multiple drivers in
parallel (after all, only one driver can bind to the device).  Instead, create
a probing thread for each device that probes the drivers one after another. 
Also make the decision to use multi-threaded probe per bus instead of per
device and adapt the pci code.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 5 deletions

diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index a3c1755b2f28..39e80fcef4b3 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -434,11 +434,6 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
         drv->driver.mod_name = mod_name;
         drv->driver.kobj.ktype = &pci_driver_kobj_type;
 
-        if (pci_multithread_probe)
-                drv->driver.multithread_probe = pci_multithread_probe;
-        else
-                drv->driver.multithread_probe = drv->multithread_probe;
-
         spin_lock_init(&drv->dynids.lock);
         INIT_LIST_HEAD(&drv->dynids.list);
 
@@ -574,6 +569,7 @@ struct bus_type pci_bus_type = {
 
 static int __init pci_driver_init(void)
 {
+        pci_bus_type.multithread_probe = pci_multithread_probe;
         return bus_register(&pci_bus_type);
 }