From: Alan Stern <stern@rowland.harvard.edu>
Date: Mon, 20 Aug 2007 14:48:05 +0000 (-0400)
Subject: USB: disable autosuspend by default for non-hubs
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7d2c592609a7da950b458403f1936d382f38ff9c;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

USB: disable autosuspend by default for non-hubs

This patch (as965) disables autosuspend by default for all USB devices
other than hubs.  We are seeing too many devices that can't suspend or
resume properly, the blacklist is growing unreasonably quickly, and
this sort of thing should be handled in userspace.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 7f17d0fd76c0..ebf3dc20110a 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -152,4 +152,10 @@ void usb_detect_quirks(struct usb_device *udev)
 	/* do any special quirk handling here if needed */
 	if (udev->quirks & USB_QUIRK_NO_AUTOSUSPEND)
 		usb_autosuspend_quirk(udev);
+
+	/* By default, disable autosuspend for all non-hubs */
+#ifdef	CONFIG_USB_SUSPEND
+	if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
+		udev->autosuspend_delay = -1;
+#endif
 }