HID: add hid_is_usb() function to make it simpler for USB detection

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@kernel.org>
Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Cc: linux-input@vger.kernel.org
Cc: stable@vger.kernel.org
Tested-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Link: https://lore.kernel.org/r/20211201183503.2373082-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 50c294be8324ab803450c00165717962e1603d13..a7a63abdea86b1e8352a9f56398a32b6dd6f5c0a 100644 (file)
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -600,7 +600,7 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
        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) {

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index bf8e727988c41b8ecbbbe35c275e8c69255081df..1f4fc98b4218c8cb78197161d98a963b0f562a0e 100644 (file)
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -2049,7 +2049,7 @@ static void wacom_update_name(struct wacom *wacom, const char *suffix)
        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;

diff --git a/include/linux/hid.h b/include/linux/hid.h
index 5a2c55ed33fac9a7138d74c121b9923d05f7ce09..f2a1f34f41e8f488dbf9c5e9d7b05b4e0dadbb2d 100644 (file)
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -807,6 +807,11 @@ static inline bool hid_is_using_ll_driver(struct hid_device *hdev,
        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