linux-kernel - [PATCH 4.9 02/42] HID: add hid_is_usb() function to make it simpler for USB detection

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Date:   Mon, 13 Dec 2021 10:29:44 +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 4.9 02/42] 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>
---
 include/linux/hid.h |    5 +++++
 1 file changed, 5 insertions(+)

--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -773,6 +773,11 @@ 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