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 97b09f28..5c33cdb 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -9,6 +9,21 @@
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 24c4116..f7c2219 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 @@
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 @@
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 @@
}
/* 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: