From cb5bddeee233e4d33857b5dd46cf2bc906e7fd19 Mon Sep 17 00:00:00 2001 From: florian Date: Tue, 8 Jan 2013 22:19:31 +0000 Subject: kernel: add support for 3.8-rc2 Signed-off-by: Florian Fainelli git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35055 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../820-usb_add_usb_find_device_by_name.patch | 84 ++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 target/linux/generic/patches-3.8/820-usb_add_usb_find_device_by_name.patch (limited to 'target/linux/generic/patches-3.8/820-usb_add_usb_find_device_by_name.patch') diff --git a/target/linux/generic/patches-3.8/820-usb_add_usb_find_device_by_name.patch b/target/linux/generic/patches-3.8/820-usb_add_usb_find_device_by_name.patch new file mode 100644 index 000000000..72b223789 --- /dev/null +++ b/target/linux/generic/patches-3.8/820-usb_add_usb_find_device_by_name.patch @@ -0,0 +1,84 @@ +--- a/drivers/usb/core/usb.c ++++ b/drivers/usb/core/usb.c +@@ -644,6 +644,71 @@ int __usb_get_extra_descriptor(char *buf + } + EXPORT_SYMBOL_GPL(__usb_get_extra_descriptor); + ++static struct usb_device *match_device_name(struct usb_device *dev, ++ const char *name) ++{ ++ struct usb_device *ret_dev = NULL; ++ struct usb_device *childdev = NULL; ++ int child; ++ ++ dev_dbg(&dev->dev, "check for name %s ...\n", name); ++ ++ /* see if this device matches */ ++ if (strcmp(dev_name(&dev->dev), name) == 0 ) { ++ dev_dbg(&dev->dev, "matched this device!\n"); ++ ret_dev = usb_get_dev(dev); ++ goto exit; ++ } ++ /* look through all of the children of this device */ ++ usb_hub_for_each_child(dev, child, childdev) { ++ if (childdev) { ++ usb_lock_device(childdev); ++ ret_dev = match_device_name(childdev, name); ++ usb_unlock_device(childdev); ++ if (ret_dev) ++ goto exit; ++ } ++ } ++exit: ++ return ret_dev; ++} ++ ++/** ++ * usb_find_device_by_name - find a specific usb device in the system ++ * @name: the name of the device to find ++ * ++ * Returns a pointer to a struct usb_device if such a specified usb ++ * device is present in the system currently. The usage count of the ++ * device will be incremented if a device is found. Make sure to call ++ * usb_put_dev() when the caller is finished with the device. ++ * ++ * If a device with the specified bus id is not found, NULL is returned. ++ */ ++struct usb_device *usb_find_device_by_name(const char *name) ++{ ++ struct list_head *buslist; ++ struct usb_bus *bus; ++ struct usb_device *dev = NULL; ++ ++ mutex_lock(&usb_bus_list_lock); ++ for (buslist = usb_bus_list.next; ++ buslist != &usb_bus_list; ++ buslist = buslist->next) { ++ bus = container_of(buslist, struct usb_bus, bus_list); ++ if (!bus->root_hub) ++ continue; ++ usb_lock_device(bus->root_hub); ++ dev = match_device_name(bus->root_hub, name); ++ usb_unlock_device(bus->root_hub); ++ if (dev) ++ goto exit; ++ } ++exit: ++ mutex_unlock(&usb_bus_list_lock); ++ return dev; ++} ++EXPORT_SYMBOL_GPL(usb_find_device_by_name); ++ + /** + * usb_alloc_coherent - allocate dma-consistent buffer for URB_NO_xxx_DMA_MAP + * @dev: device the buffer will be used with +--- a/include/linux/usb.h ++++ b/include/linux/usb.h +@@ -675,6 +675,7 @@ static inline bool usb_device_supports_l + return udev->bos->ss_cap->bmAttributes & USB_LTM_SUPPORT; + } + ++extern struct usb_device *usb_find_device_by_name(const char *name); + + /*-------------------------------------------------------------------------*/ + -- cgit v1.2.3