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authorPhil Endecott <usb_endian_patch@chezphil.org>2008-12-01 10:22:33 -0500
committerGreg Kroah-Hartman <gregkh@suse.de>2008-12-17 13:49:14 -0500
commit9a9fafb89433c5fd1331bac0c84c4b321e358b42 (patch)
tree918ec5c858d043304a47e8744cbee1ad96170298 /Documentation/usb/proc_usb_info.txt
parentc33ba392147a8506b1b43899fdea6069e27e4277 (diff)
USB: fix comment about endianness of descriptors
This patch fixes a comment and clarifies the documentation about the endianness of descriptors. The current policy is that descriptors will be little-endian at the API even on big-endian systems; however the /proc/bus/usb API predates this policy and presents descriptors with some multibyte fields byte-swapped. Signed-off-by: Phil Endecott <usb_endian_patch@chezphil.org> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/usb/proc_usb_info.txt')
-rw-r--r--Documentation/usb/proc_usb_info.txt6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/usb/proc_usb_info.txt b/Documentation/usb/proc_usb_info.txt
index 077e9032d0cd..fafcd4723260 100644
--- a/Documentation/usb/proc_usb_info.txt
+++ b/Documentation/usb/proc_usb_info.txt
@@ -49,8 +49,10 @@ it and 002/048 sometime later.
49 49
50These files can be read as binary data. The binary data consists 50These files can be read as binary data. The binary data consists
51of first the device descriptor, then the descriptors for each 51of first the device descriptor, then the descriptors for each
52configuration of the device. That information is also shown in 52configuration of the device. Multi-byte fields in the device and
53text form by the /proc/bus/usb/devices file, described later. 53configuration descriptors, but not other descriptors, are converted
54to host endianness by the kernel. This information is also shown
55in text form by the /proc/bus/usb/devices file, described later.
54 56
55These files may also be used to write user-level drivers for the USB 57These files may also be used to write user-level drivers for the USB
56devices. You would open the /proc/bus/usb/BBB/DDD file read/write, 58devices. You would open the /proc/bus/usb/BBB/DDD file read/write,