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Commit 21a96315 authored by Hans de Goede's avatar Hans de Goede Committed by Greg Kroah-Hartman
Browse files

proc_usb_info.txt: Correct documentation about endianness of config descriptors 



The config descriptors as read from /proc/bus/usb/BBB/DDD are in *bus* endian
format. Correct proc_usb_info.txt to correctly reflect that.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b4f17a48

Documentation/usb/proc_usb_info.txt

+6 −3
Original line number Diff line number Diff line
@@ -54,9 +54,12 @@ it and 002/048 sometime later. 


These files can be read as binary data.  The binary data consists

of first the device descriptor, then the descriptors for each

configuration of the device.  Multi-byte fields in the device and

configuration descriptors, but not other descriptors, are converted

to host endianness by the kernel.  This information is also shown

configuration of the device.  Multi-byte fields in the device descriptor

are converted to host endianness by the kernel.  The configuration

descriptors are in bus endian format! The configuration descriptor

are wTotalLength bytes apart. If a device returns less configuration

descriptor data than indicated by wTotalLength there will be a hole in

the file for the missing bytes.  This information is also shown

in text form by the /proc/bus/usb/devices file, described later.



These files may also be used to write user-level drivers for the USB