From 93362a875fc69881ae69299efaf19a55a1f57db0 Mon Sep 17 00:00:00 2001
From: Phil Dibowitz <phil@ipom.com>
Date: Thu, 22 Jul 2010 00:05:01 +0200
Subject: [PATCH] USB delay init quirk for logitech Harmony 700-series devices

The Logitech Harmony 700 series needs an extra delay during
initialization.  This patch adds a USB quirk which enables such a delay
and adds the device to the quirks list.

Signed-off-by: Phil Dibowitz <phil@ipom.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/usb/core/hub.c     | 6 +++++-
 drivers/usb/core/quirks.c  | 3 +++
 include/linux/usb/quirks.h | 4 ++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index d337ef80bf43..84c1897188d2 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -20,6 +20,7 @@
 #include <linux/usb.h>
 #include <linux/usbdevice_fs.h>
 #include <linux/usb/hcd.h>
+#include <linux/usb/quirks.h>
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 #include <linux/freezer.h>
@@ -1802,7 +1803,6 @@ int usb_new_device(struct usb_device *udev)
 	pm_runtime_set_active(&udev->dev);
 	pm_runtime_enable(&udev->dev);
 
-	usb_detect_quirks(udev);
 	err = usb_enumerate_device(udev);	/* Read descriptors */
 	if (err < 0)
 		goto fail;
@@ -3114,6 +3114,10 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
 		if (status < 0)
 			goto loop;
 
+		usb_detect_quirks(udev);
+		if (udev->quirks & USB_QUIRK_DELAY_INIT)
+			msleep(1000);
+
 		/* consecutive bus-powered hubs aren't reliable; they can
 		 * violate the voltage drop budget.  if the new child has
 		 * a "powered" LED, users should notice we didn't enable it
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index db99c084df92..25719da45e33 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -38,6 +38,9 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Creative SB Audigy 2 NX */
 	{ USB_DEVICE(0x041e, 0x3020), .driver_info = USB_QUIRK_RESET_RESUME },
 
+	/* Logitech Harmony 700-series */
+	{ USB_DEVICE(0x046d, 0xc122), .driver_info = USB_QUIRK_DELAY_INIT },
+
 	/* Philips PSC805 audio device */
 	{ USB_DEVICE(0x0471, 0x0155), .driver_info = USB_QUIRK_RESET_RESUME },
 
diff --git a/include/linux/usb/quirks.h b/include/linux/usb/quirks.h
index 16b7f3347545..3e93de7ecbc3 100644
--- a/include/linux/usb/quirks.h
+++ b/include/linux/usb/quirks.h
@@ -26,4 +26,8 @@
    and can't handle talking to these interfaces */
 #define USB_QUIRK_HONOR_BNUMINTERFACES	0x00000020
 
+/* device needs a pause during initialization, after we read the device
+   descriptor */
+#define USB_QUIRK_DELAY_INIT		0x00000040
+
 #endif /* __LINUX_USB_QUIRKS_H */