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

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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>
This commit is contained in:
Greg Kroah-Hartman 2007-11-26 22:11:55 -08:00
parent 5933101718
commit f2a383e4de
2 changed files with 39 additions and 12 deletions
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15
drivers/usb/core/Kconfig
View File

@ -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

36
drivers/usb/core/hub.c
View File

@ -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: