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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: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2013-08-03 16:37:49 +02:00 committed by Greg Kroah-Hartman
parent b4f17a488a
commit 21a9631586
1 changed files with 6 additions and 3 deletions
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Documentation/usb/proc_usb_info.txt
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@ -54,9 +54,12 @@ it and 002/048 sometime later.
These files can be read as binary data. The binary data consists These files can be read as binary data. The binary data consists
of first the device descriptor, then the descriptors for each of first the device descriptor, then the descriptors for each
configuration of the device. Multi-byte fields in the device and configuration of the device. Multi-byte fields in the device descriptor
configuration descriptors, but not other descriptors, are converted are converted to host endianness by the kernel. The configuration
to host endianness by the kernel. This information is also shown 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. 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 These files may also be used to write user-level drivers for the USB