linux-kernel - [PATCH 4.19 02/74] HID: add hid_is_usb() function to make it simpler for USB detection

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Message-Id: <20211213092930.855330955@linuxfoundation.org>
Date:   Mon, 13 Dec 2021 10:29:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-input@...r.kernel.org
Subject: [PATCH 4.19 02/74] HID: add hid_is_usb() function to make it simpler for USB detection

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

commit f83baa0cb6cfc92ebaf7f9d3a99d7e34f2e77a8a upstream.

A number of HID drivers already call hid_is_using_ll_driver() but only
for the detection of if this is a USB device or not.  Make this more
obvious by creating hid_is_usb() and calling the function that way.

Also converts the existing hid_is_using_ll_driver() functions to use the
new call.

Cc: Jiri Kosina <jikos@...nel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Cc: linux-input@...r.kernel.org
Cc: stable@...r.kernel.org
Tested-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
Link: https://lore.kernel.org/r/20211201183503.2373082-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/hid/hid-asus.c  |    2 +-
 drivers/hid/wacom_sys.c |    2 +-
 include/linux/hid.h     |    5 +++++
 3 files changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -622,7 +622,7 @@ static int asus_probe(struct hid_device
 	if (drvdata->quirks & QUIRK_IS_MULTITOUCH)
 		drvdata->tp = &asus_i2c_tp;
 
-	if (drvdata->quirks & QUIRK_T100_KEYBOARD) {
+	if ((drvdata->quirks & QUIRK_T100_KEYBOARD) && hid_is_usb(hdev)) {
 		struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 
 		if (intf->altsetting->desc.bInterfaceNumber == T100_TPAD_INTF) {
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2188,7 +2188,7 @@ static void wacom_update_name(struct wac
 	if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
 		char *product_name = wacom->hdev->name;
 
-		if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
+		if (hid_is_usb(wacom->hdev)) {
 			struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
 			struct usb_device *dev = interface_to_usbdev(intf);
 			product_name = dev->product;
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -834,6 +834,11 @@ static inline bool hid_is_using_ll_drive
 	return hdev->ll_driver == driver;
 }
 
+static inline bool hid_is_usb(struct hid_device *hdev)
+{
+	return hid_is_using_ll_driver(hdev, &usb_hid_driver);
+}
+
 #define	PM_HINT_FULLON	1<<5
 #define PM_HINT_NORMAL	1<<1