From 5e9eb156c003dc7f8f92287bfad0251d6c5d0ef9 Mon Sep 17 00:00:00 2001
From: Martin Pitt <martin.pitt@ubuntu.com>
Date: Tue, 15 Feb 2011 13:06:18 +0100
Subject: [PATCH] 60-persistent-input.rules: Support multiple interfaces

Create /dev/input/by-id symlinks containing the USB interface number so that
each interface in a multi-interface USB input device gets its own symlink.

Thanks to a7x <ubuntu-a7x@scientician.org>!

https://launchpad.net/bugs/626449
---
 rules/rules.d/60-persistent-input.rules | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/rules/rules.d/60-persistent-input.rules b/rules/rules.d/60-persistent-input.rules
index 634c4dbea..685e57e15 100644
--- a/rules/rules.d/60-persistent-input.rules
+++ b/rules/rules.d/60-persistent-input.rules
@@ -21,7 +21,9 @@ ENV{.INPUT_CLASS}=="?*", ENV{ID_SERIAL}=="", ENV{ID_SERIAL}="noserial"
 
 # by-id links
 KERNEL=="mouse*|js*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{.INPUT_CLASS}"
+KERNEL=="mouse*|js*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-$env{.INPUT_CLASS}"
 KERNEL=="event*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-$env{.INPUT_CLASS}"
+KERNEL=="event*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="?*", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-event-$env{.INPUT_CLASS}"
 # allow empty class for USB devices, by appending the interface number
 SUBSYSTEMS=="usb", ENV{ID_BUS}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="", ATTRS{bInterfaceNumber}=="?*", \
   SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-if$attr{bInterfaceNumber}"