centos man page for usb_string_ids_n

Query: usb_string_ids_n

OS: centos

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

USB_STRING_IDS_N(9)					      Kernel Mode Gadget API					       USB_STRING_IDS_N(9)

NAME
usb_string_ids_n - allocate unused string IDs in batch
SYNOPSIS
int usb_string_ids_n(struct usb_composite_dev * c, unsigned n);
ARGUMENTS
c the device whose string descriptor IDs are being allocated n number of string IDs to allocate
CONTEXT
single threaded during gadget setup
DESCRIPTION
Returns the first requested ID. This ID and next n-1 IDs are now valid IDs. At least provided that n is non-zero because if it is, returns last requested ID which is now very useful information. usb_string_ids_n() is called from bind callbacks to allocate string IDs. Drivers for functions, configurations, or gadgets will then store that ID in the appropriate descriptors and string table. All string identifier should be allocated using this, usb_string_id() or usb_string_ids_n() routine, to ensure that for example different functions don't wrongly assign different meanings to the same identifier.
AUTHOR
David Brownell <dbrownell@users.sourceforge.net> Author.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 USB_STRING_IDS_N(9)
Related Man Pages
struct_usb_gadget_driver(9) - centos
struct_usb_composite_driver(9) - centos
usb_interface_id(9) - centos
struct_usb_composite_dev(9) - suse
usb_gadget_config_buf(9) - suse
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