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authorPeter Hutterer <peter.hutterer@who-t.net>2018-12-05 10:42:22 +1000
committerBenjamin Tissoires <benjamin.tissoires@redhat.com>2018-12-07 16:27:12 +0100
commitc53431eb696f3c64c12c00afb81048af54b61532 (patch)
treec0f52c90c7a7fdbace4088af27c41fe9de6103b0 /drivers/hid
parent52ea899637c746984d657b508da6e3f2686adfca (diff)
HID: core: store the collections as a basic tree
For each collection parsed, store a pointer to the parent collection (if any). This makes it a lot easier to look up which collection(s) any given item is part of Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Verified-by: Harry Cutts <hcutts@chromium.org> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-core.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 5bec9244c45b..43d488a45120 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -172,6 +172,8 @@ static int open_collection(struct hid_parser *parser, unsigned type)
collection->type = type;
collection->usage = usage;
collection->level = parser->collection_stack_ptr - 1;
+ collection->parent = parser->active_collection;
+ parser->active_collection = collection;
if (type == HID_COLLECTION_APPLICATION)
parser->device->maxapplication++;
@@ -190,6 +192,8 @@ static int close_collection(struct hid_parser *parser)
return -EINVAL;
}
parser->collection_stack_ptr--;
+ if (parser->active_collection)
+ parser->active_collection = parser->active_collection->parent;
return 0;
}