centos man page for usb_ifnum_to_if

Query: usb_ifnum_to_if

OS: centos

Section: 9

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

USB_IFNUM_TO_IF(9)						   USB Core APIs						USB_IFNUM_TO_IF(9)

NAME
usb_ifnum_to_if - get the interface object with a given interface number
SYNOPSIS
struct usb_interface * usb_ifnum_to_if(const struct usb_device * dev, unsigned ifnum);
ARGUMENTS
dev the device whose current configuration is considered ifnum the desired interface
DESCRIPTION
This walks the device descriptor for the currently active configuration to find the interface object with the particular interface number. Note that configuration descriptors are not required to assign interface numbers sequentially, so that it would be incorrect to assume that the first interface in that descriptor corresponds to interface zero. This routine helps device drivers avoid such mistakes. However, you should make sure that you do the right thing with any alternate settings available for this interfaces. Don't call this function unless you are bound to one of the interfaces on this device or you have locked the device!
RETURN
A pointer to the interface that has ifnum as interface number, if found. NULL otherwise.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 USB_IFNUM_TO_IF(9)
Related Man Pages
usb_set_interface(9) - suse
struct_usb_interface(9) - centos
usb_gadget_config_buf(9) - centos
usb_match_id(9) - centos
usb_queue_reset_device(9) - centos
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