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USB: Remove duplicate USB 3.0 hub feature #defines.
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Somehow we ended up with duplicate hub feature #defines in ch11.h.
Tatyana Brokhman first created the USB 3.0 hub feature macros in 2.6.38
with commit 0eadcc0 "usb: USB3.0 ch11
definitions".  In 2.6.39, I modified a patch from John Youn that added
similar macros in a different place in the same file, and committed
dbe79bb "USB 3.0 Hub Changes".

Some of the #defines used different names for the same values.  Others
used exactly the same names with the same values, like these gems:

 #define USB_PORT_FEAT_BH_PORT_RESET     28
...
 #define USB_PORT_FEAT_BH_PORT_RESET            28

According to my very geeky husband (who looked it up in the C99 spec),
it is allowed to have object-like macros with duplicate names as long as
the replacement list is exactly the same.  However, he recalled that
some compilers will give warnings when they find duplicate macros.  It's
probably best to remove the duplicates in the stable tree, so that the
code compiles for everyone.

The macros are now fixed to move the feature requests that are specific
to USB 3.0 hubs into a new section (out of the USB 2.0 hub feature
section), and use the most common macro name.

This patch should be backported to 2.6.39.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tatyana Brokhman <tlinder@codeaurora.org>
Cc: John Youn <johnyoun@synopsys.com>
Cc: Jamey Sharp <jamey@minilop.net>
Cc: stable@vger.kernel.org
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Sarah Sharp committed Feb 10, 2012
1 parent fe25092 commit d9f5343
Showing 1 changed file with 2 additions and 8 deletions.
10 changes: 2 additions & 8 deletions include/linux/usb/ch11.h
Original file line number Diff line number Diff line change
Expand Up @@ -61,12 +61,6 @@
#define USB_PORT_FEAT_TEST 21
#define USB_PORT_FEAT_INDICATOR 22
#define USB_PORT_FEAT_C_PORT_L1 23
#define USB_PORT_FEAT_C_PORT_LINK_STATE 25
#define USB_PORT_FEAT_C_PORT_CONFIG_ERROR 26
#define USB_PORT_FEAT_PORT_REMOTE_WAKE_MASK 27
#define USB_PORT_FEAT_BH_PORT_RESET 28
#define USB_PORT_FEAT_C_BH_PORT_RESET 29
#define USB_PORT_FEAT_FORCE_LINKPM_ACCEPT 30

/*
* Port feature selectors added by USB 3.0 spec.
Expand All @@ -75,8 +69,8 @@
#define USB_PORT_FEAT_LINK_STATE 5
#define USB_PORT_FEAT_U1_TIMEOUT 23
#define USB_PORT_FEAT_U2_TIMEOUT 24
#define USB_PORT_FEAT_C_LINK_STATE 25
#define USB_PORT_FEAT_C_CONFIG_ERR 26
#define USB_PORT_FEAT_C_PORT_LINK_STATE 25
#define USB_PORT_FEAT_C_PORT_CONFIG_ERROR 26
#define USB_PORT_FEAT_REMOTE_WAKE_MASK 27
#define USB_PORT_FEAT_BH_PORT_RESET 28
#define USB_PORT_FEAT_C_BH_PORT_RESET 29
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