[media] v4l2: remove obsolete v4l2_chip_match_host()

This function is no longer needed since it is now the responsibility of the
v4l2 core to check if the DBG_G/S_REGISTER and DBG_G_CHIP_INFO ioctls are
called for the bridge driver or not.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/usbvision/usbvision-video.c

@@ -467,8 +467,6 @@ static int vidioc_g_register(struct file *file, void *priv,
 	struct usb_usbvision *usbvision = video_drvdata(file);
 	int err_code;
 
-	if (!v4l2_chip_match_host(&reg->match))
-		return -EINVAL;
 	/* NT100x has a 8-bit register space */
 	err_code = usbvision_read_reg(usbvision, reg->reg&0xff);
 	if (err_code < 0) {
@@ -488,8 +486,6 @@ static int vidioc_s_register(struct file *file, void *priv,
 	struct usb_usbvision *usbvision = video_drvdata(file);
 	int err_code;
 
-	if (!v4l2_chip_match_host(&reg->match))
-		return -EINVAL;
 	/* NT100x has a 8-bit register space */
 	err_code = usbvision_write_reg(usbvision, reg->reg & 0xff, reg->val);
 	if (err_code < 0) {

drivers/media/v4l2-core/v4l2-common.c

@@ -227,17 +227,6 @@ u32 v4l2_ctrl_next(const u32 * const * ctrl_classes, u32 id)
 }
 EXPORT_SYMBOL(v4l2_ctrl_next);
 
-int v4l2_chip_match_host(const struct v4l2_dbg_match *match)
-{
-	switch (match->type) {
-	case V4L2_CHIP_MATCH_BRIDGE:
-		return match->addr == 0;
-	default:
-		return 0;
-	}
-}
-EXPORT_SYMBOL(v4l2_chip_match_host);
-
 #if IS_ENABLED(CONFIG_I2C)
 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match)
 {

include/media/v4l2-common.h

@@ -106,7 +106,6 @@ struct i2c_client; /* forward reference */
 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match);
 int v4l2_chip_ident_i2c_client(struct i2c_client *c, struct v4l2_dbg_chip_ident *chip,
 		u32 ident, u32 revision);
-int v4l2_chip_match_host(const struct v4l2_dbg_match *match);
 
 /* ------------------------------------------------------------------------- */