USB: remove CONFIG_USB_PERSIST setting
This patch (as1047) removes the USB_PERSIST Kconfig option, enabling
it permanently. It also prevents the power/persist attribute from
being created for hub devices; there's no point in having it since
USB-PERSIST is always turned on for hubs.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index dfc5418..f384edf 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -97,4 +97,16 @@
if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
udev->autosuspend_disabled = 1;
#endif
+
+#ifdef CONFIG_PM
+ /* Hubs are automatically enabled for USB-PERSIST */
+ if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
+ udev->persist_enabled = 1;
+#else
+ /* In the absense of PM, we can safely enable USB-PERSIST
+ * for all devices. It will affect things like hub resets
+ * and EMF-related port disables.
+ */
+ udev->persist_enabled = 1;
+#endif /* CONFIG_PM */
}
