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USB: move the definition of USB_MAXCHILDREN

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The USB_MAXCHILDREN symbol is used in include/uapi/linux/usb/ch11.h, a
user-mode header, even though it is defined in include/linux/usb.h,
which is kernel-only.  This causes compile-time errors when user
programs try to #include linux/usb/ch11.h.

This patch fixes the problem by moving the definition of USB_MAXCHILDREN
into ch11.h.  It also gets rid of unneeded parentheses.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Stern 2013-06-27 15:27:07 -04:00 committed by Greg Kroah-Hartman
parent 39c242704c
commit 36ff66db3f
2 changed files with 11 additions and 11 deletions
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11
include/linux/usb.h
View File

@ -367,17 +367,6 @@ struct usb_bus {
/* ----------------------------------------------------------------------- */
/* This is arbitrary.
* From USB 2.0 spec Table 11-13, offset 7, a hub can
* have up to 255 ports. The most yet reported is 10.
*
* Current Wireless USB host hardware (Intel i1480 for example) allows
* up to 22 devices to connect. Upcoming hardware might raise that
* limit. Because the arrays need to add a bit for hub status data, we
* do 31, so plus one evens out to four bytes.
*/
#define USB_MAXCHILDREN (31)
struct usb_tt;
enum usb_device_removable {

11
include/uapi/linux/usb/ch11.h
View File

@ -11,6 +11,17 @@
#include <linux/types.h> /* __u8 etc */
/* This is arbitrary.
* From USB 2.0 spec Table 11-13, offset 7, a hub can
* have up to 255 ports. The most yet reported is 10.
*
* Current Wireless USB host hardware (Intel i1480 for example) allows
* up to 22 devices to connect. Upcoming hardware might raise that
* limit. Because the arrays need to add a bit for hub status data, we
* use 31, so plus one evens out to four bytes.
*/
#define USB_MAXCHILDREN 31
/*
* Hub request types
*/