diff options
author | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:41:03 -0500 |
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committer | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:41:03 -0500 |
commit | 8a83780a187ba1961380814eaf9c503043345d12 (patch) | |
tree | 80f5d89cca49330e137688c72fb10c9f42dc5663 /drivers/usb/core/usb.c | |
parent | 14a4057959f8ee0a2249eb2abd64fd6b1f571d98 (diff) |
Digi Release Code from del-5.6/main2.6.31-digi-201102141643
Diffstat (limited to 'drivers/usb/core/usb.c')
-rw-r--r-- | drivers/usb/core/usb.c | 31 |
1 files changed, 16 insertions, 15 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index a26f73880c32..b661dbd93208 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -132,7 +132,7 @@ EXPORT_SYMBOL_GPL(usb_altnum_to_altsetting); struct find_interface_arg { int minor; - struct usb_interface *interface; + struct device_driver *drv; }; static int __find_interface(struct device *dev, void *data) @@ -143,12 +143,10 @@ static int __find_interface(struct device *dev, void *data) if (!is_usb_interface(dev)) return 0; + if (dev->driver != arg->drv) + return 0; intf = to_usb_interface(dev); - if (intf->minor != -1 && intf->minor == arg->minor) { - arg->interface = intf; - return 1; - } - return 0; + return intf->minor == arg->minor; } /** @@ -156,21 +154,24 @@ static int __find_interface(struct device *dev, void *data) * @drv: the driver whose current configuration is considered * @minor: the minor number of the desired device * - * This walks the driver device list and returns a pointer to the interface - * with the matching minor. Note, this only works for devices that share the - * USB major number. + * This walks the bus device list and returns a pointer to the interface + * with the matching minor and driver. Note, this only works for devices + * that share the USB major number. */ struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor) { struct find_interface_arg argb; - int retval; + struct device *dev; argb.minor = minor; - argb.interface = NULL; - /* eat the error, it will be in argb.interface */ - retval = driver_for_each_device(&drv->drvwrap.driver, NULL, &argb, - __find_interface); - return argb.interface; + argb.drv = &drv->drvwrap.driver; + + dev = bus_find_device(&usb_bus_type, NULL, &argb, __find_interface); + + /* Drop reference count from bus_find_device */ + put_device(dev); + + return dev ? to_usb_interface(dev) : NULL; } EXPORT_SYMBOL_GPL(usb_find_interface); |