USB: create a new thread for every USB device found during the probe sequence

Might speed up some systems.  If nothing else, a bad driver should not
take the whole USB subsystem down with it.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 6e3b5358a760..f8324d8d06ac 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -72,6 +72,21 @@ config USB_SUSPEND
 
           If you are unsure about this, say N here.
 
+config USB_MULTITHREAD_PROBE
+        bool "USB Multi-threaded probe (EXPERIMENTAL)"
+        depends on USB && EXPERIMENTAL
+        default n
+        help
+          Say Y here if you want the USB core to spawn a new thread for
+          every USB device that is probed.  This can cause a small speedup
+          in boot times on systems with a lot of different USB devices.
+
+          This option should be safe to enable, but if any odd probing
+          problems are found, please disable it, or dynamically turn it
+          off in the /sys/module/usbcore/parameters/multithread_probe
+          file
+
+          When in doubt, say N.
 
 config USB_OTG
         bool