linux-kernel - [PATCH] HID: lg: restrict filtering out of first interface to G29 only

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Date:	Tue,  1 Dec 2015 10:26:24 +0100
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Jiri Kosina <jikos@...nel.org>, Simon Wood <simon@...gewell.org>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] HID: lg: restrict filtering out of first interface to G29 only

Looks like 29fae1c85 ("HID: logitech: Add support for G29") was a little
bit aggressive and broke other devices.

Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=108121

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
---

Hi Jiri,

as reported in #108121, this is 4.4-rc material. At least 2 people already
started complaining about it on the mailing list, so it should definitively
be fixed before 4.4 is out.

Cheers,
Benjamin

 drivers/hid/hid-lg.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-lg.c b/drivers/hid/hid-lg.c
index c20ac76..c690fae 100644
--- a/drivers/hid/hid-lg.c
+++ b/drivers/hid/hid-lg.c
@@ -665,8 +665,9 @@ static int lg_probe(struct hid_device *hdev, const struct hid_device_id *id)
 	struct lg_drv_data *drv_data;
 	int ret;
 
-	/* Only work with the 1st interface (G29 presents multiple) */
-	if (iface_num != 0) {
+	/* G29 only work with the 1st interface */
+	if ((hdev->product == USB_DEVICE_ID_LOGITECH_G29_WHEEL) &&
+	    (iface_num != 0)) {
 		dbg_hid("%s: ignoring ifnum %d\n", __func__, iface_num);
 		return -ENODEV;
 	}
-- 
2.5.0

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