linux-kernel - [PATCH v1 2/2] Revert "HID: logitech-hidpp: Enable HID++ for all the Logitech Bluetooth devices"

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Date:   Wed,  7 Dec 2022 15:24:33 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Jiri Kosina <jikos@...nel.org>,
        Filipe Laíns <lains@...eup.net>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Bastien Nocera <hadess@...ess.net>,
        Thorsten Leemhuis <regressions@...mhuis.info>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: [PATCH v1 2/2] Revert "HID: logitech-hidpp: Enable HID++ for all the Logitech Bluetooth devices"

This reverts commit 532223c8ac57605a10e46dc0ab23dcf01c9acb43.

As reported in [0], hid-logitech-hidpp now binds on all bluetooth mice,
but there are corner cases where hid-logitech-hidpp just gives up on
the mouse. This leads the end user with a dead mouse.

Given that we are at -rc8, we are definitively too late to find a proper
fix. We already identified 2 issues less than 24 hours after the bug
report. One in that ->match() was never designed to be used anywhere else
than in hid-generic, and the other that hid-logitech-hidpp has corner
cases where it gives up on devices it is not supposed to.

So we have no choice but postpone this patch to the next kernel release.

[0] https://lore.kernel.org/linux-input/CAJZ5v0g-_o4AqMgNwihCb0jrwrcJZfRrX=jv8aH54WNKO7QB8A@mail.gmail.com/

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---
 drivers/hid/hid-logitech-hidpp.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index f11890f65c06..c6e4a96e882e 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -4269,21 +4269,6 @@ static void hidpp_remove(struct hid_device *hdev)
 	mutex_destroy(&hidpp->send_mutex);
 }
 
-static const struct hid_device_id unhandled_hidpp_devices[] = {
-	/* Logitech Harmony Adapter for PS3, handled in hid-sony */
-	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_HARMONY_PS3) },
-	/* Handled in hid-generic */
-	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD) },
-	{}
-};
-
-static bool hidpp_match(struct hid_device *hdev,
-			bool ignore_special_driver)
-{
-	/* Refuse to handle devices handled by other HID drivers */
-	return !hid_match_id(hdev, unhandled_hidpp_devices);
-}
-
 #define LDJ_DEVICE(product) \
 	HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE, \
 		   USB_VENDOR_ID_LOGITECH, (product))
@@ -4376,9 +4361,6 @@ static const struct hid_device_id hidpp_devices[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb01e) },
 	{ /* MX Master 3 mouse over Bluetooth */
 	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH, 0xb023) },
-
-	{ /* And try to enable HID++ for all the Logitech Bluetooth devices */
-	  HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_ANY, USB_VENDOR_ID_LOGITECH, HID_ANY_ID) },
 	{}
 };
 
@@ -4392,7 +4374,6 @@ static const struct hid_usage_id hidpp_usages[] = {
 static struct hid_driver hidpp_driver = {
 	.name = "logitech-hidpp-device",
 	.id_table = hidpp_devices,
-	.match = hidpp_match,
 	.report_fixup = hidpp_report_fixup,
 	.probe = hidpp_probe,
 	.remove = hidpp_remove,
-- 
2.38.1