HID: Allow bus wildcard matching

Most HID drivers do not need to know what bus driver is in use. A generic group driver can drive any hid device, and the device list should not need to be duplicated for each new bus. This patch adds wildcard matching to the HID bus, simplifying device list handling for group drivers. Signed-off-by: Henrik Rydberg <[email protected]> Acked-by: Benjamin Tissoires <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
oohal · May 1, 2012 · 7431fb7 · 7431fb7
1 parent 734c660
commit 7431fb7
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Showing 3 changed files with 4 additions and 2 deletions.
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
@@ -1273,7 +1273,7 @@ EXPORT_SYMBOL_GPL(hid_input_report);
 static bool hid_match_one_id(struct hid_device *hdev,
 		const struct hid_device_id *id)
 {
-	return id->bus == hdev->bus &&
+	return (id->bus == HID_BUS_ANY || id->bus == hdev->bus) &&
 		(id->group == HID_GROUP_ANY || id->group == hdev->group) &&
 		(id->vendor == HID_ANY_ID || id->vendor == hdev->vendor) &&
 		(id->product == HID_ANY_ID || id->product == hdev->product);

diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
@@ -132,6 +132,7 @@ struct usb_device_id {
 #define USB_DEVICE_ID_MATCH_INT_PROTOCOL	0x0200
 
 #define HID_ANY_ID				(~0)
+#define HID_BUS_ANY				0xffff
 #define HID_GROUP_ANY				0x0000
 
 struct hid_device_id {

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
@@ -340,7 +340,8 @@ static int do_hid_entry(const char *filename,
 	id->vendor = TO_NATIVE(id->vendor);
 	id->product = TO_NATIVE(id->product);
 
-	sprintf(alias, "hid:b%04X", id->bus);
+	sprintf(alias, "hid:");
+	ADD(alias, "b", id->bus != HID_BUS_ANY, id->bus);
 	ADD(alias, "g", id->group != HID_GROUP_ANY, id->group);
 	ADD(alias, "v", id->vendor != HID_ANY_ID, id->vendor);
 	ADD(alias, "p", id->product != HID_ANY_ID, id->product);