From: Chanh Nguyen Date: Wed, 11 Jan 2023 06:51:05 +0000 (+0700) Subject: USB: gadget: Add ID numbers to configfs-gadget driver names X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=96abcf7230d7b860c445e2ea8645524c31d0106c;p=users%2Fjedix%2Flinux-maple.git USB: gadget: Add ID numbers to configfs-gadget driver names commit 7c07553807c5125c89de242d35c10c206fd8e6bb upstream. It is unable to use configfs to attach more than one gadget. When attaching the second gadget, it always fails and the kernel message prints out: Error: Driver 'configfs-gadget' is already registered, aborting... UDC core: g1: driver registration failed: -16 This commit fixes the problem by using the gadget name as a suffix to each configfs_gadget's driver name, thus making the names distinct. Fixes: fc274c1e9973 ("USB: gadget: Add a new bus for gadgets") Cc: stable Signed-off-by: Chanh Nguyen Reviewed-by: Andrzej Pietrasiewicz Tested-by: Heikki Krogerus Reviewed-by: Frank Li Link: https://lore.kernel.org/r/20230111065105.29205-1-chanh@os.amperecomputing.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c index 3a6b4926193e..7bbc77618546 100644 --- a/drivers/usb/gadget/configfs.c +++ b/drivers/usb/gadget/configfs.c @@ -392,6 +392,7 @@ static void gadget_info_attr_release(struct config_item *item) WARN_ON(!list_empty(&gi->string_list)); WARN_ON(!list_empty(&gi->available_func)); kfree(gi->composite.gadget_driver.function); + kfree(gi->composite.gadget_driver.driver.name); kfree(gi); } @@ -1571,7 +1572,6 @@ static const struct usb_gadget_driver configfs_driver_template = { .max_speed = USB_SPEED_SUPER_PLUS, .driver = { .owner = THIS_MODULE, - .name = "configfs-gadget", }, .match_existing_only = 1, }; @@ -1622,13 +1622,21 @@ static struct config_group *gadgets_make( gi->composite.gadget_driver = configfs_driver_template; + gi->composite.gadget_driver.driver.name = kasprintf(GFP_KERNEL, + "configfs-gadget.%s", name); + if (!gi->composite.gadget_driver.driver.name) + goto err; + gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); gi->composite.name = gi->composite.gadget_driver.function; if (!gi->composite.gadget_driver.function) - goto err; + goto out_free_driver_name; return &gi->group; + +out_free_driver_name: + kfree(gi->composite.gadget_driver.driver.name); err: kfree(gi); return ERR_PTR(-ENOMEM);