This is a note to let you know that I've just added the patch titled
HID: add per device quirk to force bind to hid-generic
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
hid-add-per-device-quirk-to-force-bind-to-hid-generi.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e9ce743ec31a1ae09095ab6b8fa8a26459890b74
Author: Benjamin Tissoires <bentiss@xxxxxxxxxx>
Date: Tue Oct 1 16:30:12 2024 +0200
HID: add per device quirk to force bind to hid-generic
[ Upstream commit 645c224ac5f6e0013931c342ea707b398d24d410 ]
We already have the possibility to force not binding to hid-generic and
rely on a dedicated driver, but we couldn't do the other way around.
This is useful for BPF programs where we are fixing the report descriptor
and the events, but want to avoid a specialized driver to come after BPF
which would unwind everything that is done there.
Reviewed-by: Peter Hutterer <peter.hutterer@xxxxxxxxx>
Link: https://patch.msgid.link/20241001-hid-bpf-hid-generic-v3-8-2ef1019468df@xxxxxxxxxx
Signed-off-by: Benjamin Tissoires <bentiss@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 582fd234eec78..935ccc38d1295 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2674,9 +2674,10 @@ static bool hid_check_device_match(struct hid_device *hdev,
/*
* hid-generic implements .match(), so we must be dealing with a
* different HID driver here, and can simply check if
- * hid_ignore_special_drivers is set or not.
+ * hid_ignore_special_drivers or HID_QUIRK_IGNORE_SPECIAL_DRIVER
+ * are set or not.
*/
- return !hid_ignore_special_drivers;
+ return !hid_ignore_special_drivers && !(hdev->quirks & HID_QUIRK_IGNORE_SPECIAL_DRIVER);
}
static int __hid_device_probe(struct hid_device *hdev, struct hid_driver *hdrv)
diff --git a/drivers/hid/hid-generic.c b/drivers/hid/hid-generic.c
index d2439399fb357..9e04c6d0fcc87 100644
--- a/drivers/hid/hid-generic.c
+++ b/drivers/hid/hid-generic.c
@@ -40,6 +40,9 @@ static bool hid_generic_match(struct hid_device *hdev,
if (ignore_special_driver)
return true;
+ if (hdev->quirks & HID_QUIRK_IGNORE_SPECIAL_DRIVER)
+ return true;
+
if (hdev->quirks & HID_QUIRK_HAVE_SPECIAL_DRIVER)
return false;
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 121d5b8bc8675..a7d60a1c72a09 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -359,6 +359,7 @@ struct hid_item {
* | @HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP:
* | @HID_QUIRK_HAVE_SPECIAL_DRIVER:
* | @HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE:
+ * | @HID_QUIRK_IGNORE_SPECIAL_DRIVER
* | @HID_QUIRK_FULLSPEED_INTERVAL:
* | @HID_QUIRK_NO_INIT_REPORTS:
* | @HID_QUIRK_NO_IGNORE:
@@ -384,6 +385,7 @@ struct hid_item {
#define HID_QUIRK_HAVE_SPECIAL_DRIVER BIT(19)
#define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE BIT(20)
#define HID_QUIRK_NOINVERT BIT(21)
+#define HID_QUIRK_IGNORE_SPECIAL_DRIVER BIT(22)
#define HID_QUIRK_FULLSPEED_INTERVAL BIT(28)
#define HID_QUIRK_NO_INIT_REPORTS BIT(29)
#define HID_QUIRK_NO_IGNORE BIT(30)
