From: Greg Kroah-Hartman <gregkh@suse.de>
Date: Tue, 27 Nov 2007 06:11:55 +0000 (-0800)
Subject: USB: always announce a device has been added to the system
X-Git-Tag: firefly_0821_release~23568^2~79
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f2a383e4de50ad9c03676e57703a97d081798e55;p=firefly-linux-kernel-4.4.55.git

USB: always announce a device has been added to the system

Distros (like SuSE) want to know this information, to make it easier
to handle support issues.  Might as well let everyone benefit from this.
This is also enabled whenever CONFIG_USB_DEBUG is enabled, to help with
debugging.

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

diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index 97b09f282705..5c33cdb9cac7 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -9,6 +9,21 @@ config USB_DEBUG
 	  of debug messages to the system log. Select this if you are having a
 	  problem with USB support and want to see more of what is going on.
 
+config USB_ANNOUNCE_NEW_DEVICES
+	bool "USB announce new devices"
+	depends on USB
+	default N
+	help
+	  Say Y here if you want the USB core to always announce the
+	  idVendor, idProduct, Manufacturer, Product, and SerialNumber
+	  strings for every new USB device to the syslog.  This option is
+	  usually used by distro vendors to help with debugging and to
+	  let users know what specific device was added to the machine
+	  in what location.
+
+	  If you do not want this kind of information sent to the system
+	  log, or have any doubts about this, say N here.
+
 comment "Miscellaneous USB options"
 	depends on USB
 
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 24c411697d1e..f7c2219c800f 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -37,6 +37,13 @@
 #define	USB_PERSIST	0
 #endif
 
+/* if we are in debug mode, always announce new devices */
+#ifdef DEBUG
+#ifndef CONFIG_USB_ANNOUNCE_NEW_DEVICES
+#define CONFIG_USB_ANNOUNCE_NEW_DEVICES
+#endif
+#endif
+
 struct usb_hub {
 	struct device		*intfdev;	/* the "interface" device */
 	struct usb_device	*hdev;
@@ -1207,7 +1214,7 @@ void usb_disconnect(struct usb_device **pdev)
 	put_device(&udev->dev);
 }
 
-#ifdef DEBUG
+#ifdef CONFIG_USB_ANNOUNCE_NEW_DEVICES
 static void show_string(struct usb_device *udev, char *id, char *string)
 {
 	if (!string)
@@ -1215,12 +1222,24 @@ static void show_string(struct usb_device *udev, char *id, char *string)
 	dev_printk(KERN_INFO, &udev->dev, "%s: %s\n", id, string);
 }
 
+static void announce_device(struct usb_device *udev)
+{
+	dev_info(&udev->dev, "New USB device found, idVendor=%04x, idProduct=%04x\n",
+		le16_to_cpu(udev->descriptor.idVendor),
+		le16_to_cpu(udev->descriptor.idProduct));
+	dev_info(&udev->dev, "New USB device strings: Mfr=%d, Product=%d, "
+		"SerialNumber=%d\n",
+		udev->descriptor.iManufacturer,
+		udev->descriptor.iProduct,
+		udev->descriptor.iSerialNumber);
+	show_string(udev, "Product", udev->product);
+	show_string(udev, "Manufacturer", udev->manufacturer);
+	show_string(udev, "SerialNumber", udev->serial);
+}
 #else
-static inline void show_string(struct usb_device *udev, char *id, char *string)
-{}
+static inline void announce_device(struct usb_device *udev) { }
 #endif
 
-
 #ifdef	CONFIG_USB_OTG
 #include "otg_whitelist.h"
 #endif
@@ -1390,14 +1409,7 @@ int usb_new_device(struct usb_device *udev)
 	}
 
 	/* Tell the world! */
-	dev_dbg(&udev->dev, "new device strings: Mfr=%d, Product=%d, "
-		"SerialNumber=%d\n",
-		udev->descriptor.iManufacturer,
-		udev->descriptor.iProduct,
-		udev->descriptor.iSerialNumber);
-	show_string(udev, "Product", udev->product);
-	show_string(udev, "Manufacturer", udev->manufacturer);
-	show_string(udev, "SerialNumber", udev->serial);
+	announce_device(udev);
 	return err;
 
 fail: