usb: gadget: uvc: Replace plain printk() with dev_*()

Adding device context to the kernel log messages make them more useful.
Add new uvcg_* macros based on dev_*() that print both the gadget device
name and the function name.

While at it, remove a commented out printk statement and an unused
printk-based macro.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Tested-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 17 insertions, 24 deletions

diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
index 4ea987741e6e..0cc4a6220050 100644
--- a/drivers/usb/gadget/function/f_uvc.c
+++ b/drivers/usb/gadget/function/f_uvc.c
@@ -232,13 +232,8 @@ uvc_function_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 	struct v4l2_event v4l2_event;
 	struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
 
-	/* printk(KERN_INFO "setup request %02x %02x value %04x index %04x %04x\n",
-	 *	ctrl->bRequestType, ctrl->bRequest, le16_to_cpu(ctrl->wValue),
-	 *	le16_to_cpu(ctrl->wIndex), le16_to_cpu(ctrl->wLength));
-	 */
-
 	if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) {
-		INFO(f->config->cdev, "invalid request type\n");
+		uvcg_info(f, "invalid request type\n");
 		return -EINVAL;
 	}
 
@@ -272,7 +267,7 @@ uvc_function_get_alt(struct usb_function *f, unsigned interface)
 {
 	struct uvc_device *uvc = to_uvc(f);
 
-	INFO(f->config->cdev, "uvc_function_get_alt(%u)\n", interface);
+	uvcg_info(f, "%s(%u)\n", __func__, interface);
 
 	if (interface == uvc->control_intf)
 		return 0;
@@ -291,13 +286,13 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
 	struct uvc_event *uvc_event = (void *)&v4l2_event.u.data;
 	int ret;
 
-	INFO(cdev, "uvc_function_set_alt(%u, %u)\n", interface, alt);
+	uvcg_info(f, "%s(%u, %u)\n", __func__, interface, alt);
 
 	if (interface == uvc->control_intf) {
 		if (alt)
 			return -EINVAL;
 
-		INFO(cdev, "reset UVC Control\n");
+		uvcg_info(f, "reset UVC Control\n");
 		usb_ep_disable(uvc->control_ep);
 
 		if (!uvc->control_ep->desc)
@@ -348,7 +343,7 @@ uvc_function_set_alt(struct usb_function *f, unsigned interface, unsigned alt)
 		if (!uvc->video.ep)
 			return -EINVAL;
 
-		INFO(cdev, "reset UVC\n");
+		uvcg_info(f, "reset UVC\n");
 		usb_ep_disable(uvc->video.ep);
 
 		ret = config_ep_by_speed(f->config->cdev->gadget,
@@ -373,7 +368,7 @@ uvc_function_disable(struct usb_function *f)
 	struct uvc_device *uvc = to_uvc(f);
 	struct v4l2_event v4l2_event;
 
-	INFO(f->config->cdev, "uvc_function_disable\n");
+	uvcg_info(f, "%s()\n", __func__);
 
 	memset(&v4l2_event, 0, sizeof(v4l2_event));
 	v4l2_event.type = UVC_EVENT_DISCONNECT;
@@ -392,21 +387,19 @@ uvc_function_disable(struct usb_function *f)
 void
 uvc_function_connect(struct uvc_device *uvc)
 {
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
 	int ret;
 
 	if ((ret = usb_function_activate(&uvc->func)) < 0)
-		INFO(cdev, "UVC connect failed with %d\n", ret);
+		uvcg_info(&uvc->func, "UVC connect failed with %d\n", ret);
 }
 
 void
 uvc_function_disconnect(struct uvc_device *uvc)
 {
-	struct usb_composite_dev *cdev = uvc->func.config->cdev;
 	int ret;
 
 	if ((ret = usb_function_deactivate(&uvc->func)) < 0)
-		INFO(cdev, "UVC disconnect failed with %d\n", ret);
+		uvcg_info(&uvc->func, "UVC disconnect failed with %d\n", ret);
 }
 
 /* --------------------------------------------------------------------------
@@ -605,7 +598,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	struct f_uvc_opts *opts;
 	int ret = -EINVAL;
 
-	INFO(cdev, "uvc_function_bind\n");
+	uvcg_info(f, "%s()\n", __func__);
 
 	opts = fi_to_f_uvc_opts(f->fi);
 	/* Sanity check the streaming endpoint module parameters.
@@ -618,8 +611,8 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	if (opts->streaming_maxburst &&
 	    (opts->streaming_maxpacket % 1024) != 0) {
 		opts->streaming_maxpacket = roundup(opts->streaming_maxpacket, 1024);
-		INFO(cdev, "overriding streaming_maxpacket to %d\n",
-		     opts->streaming_maxpacket);
+		uvcg_info(f, "overriding streaming_maxpacket to %d\n",
+			  opts->streaming_maxpacket);
 	}
 
 	/* Fill in the FS/HS/SS Video Streaming specific descriptors from the
@@ -658,7 +651,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	/* Allocate endpoints. */
 	ep = usb_ep_autoconfig(cdev->gadget, &uvc_control_ep);
 	if (!ep) {
-		INFO(cdev, "Unable to allocate control EP\n");
+		uvcg_info(f, "Unable to allocate control EP\n");
 		goto error;
 	}
 	uvc->control_ep = ep;
@@ -672,7 +665,7 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 		ep = usb_ep_autoconfig(cdev->gadget, &uvc_fs_streaming_ep);
 
 	if (!ep) {
-		INFO(cdev, "Unable to allocate streaming EP\n");
+		uvcg_info(f, "Unable to allocate streaming EP\n");
 		goto error;
 	}
 	uvc->video.ep = ep;
@@ -745,19 +738,19 @@ uvc_function_bind(struct usb_configuration *c, struct usb_function *f)
 	uvc->control_req->context = uvc;
 
 	if (v4l2_device_register(&cdev->gadget->dev, &uvc->v4l2_dev)) {
-		printk(KERN_INFO "v4l2_device_register failed\n");
+		uvcg_err(f, "failed to register V4L2 device\n");
 		goto error;
 	}
 
 	/* Initialise video. */
-	ret = uvcg_video_init(&uvc->video);
+	ret = uvcg_video_init(&uvc->video, uvc);
 	if (ret < 0)
 		goto error;
 
 	/* Register a V4L2 device. */
 	ret = uvc_register_video(uvc);
 	if (ret < 0) {
-		printk(KERN_INFO "Unable to register video device\n");
+		uvcg_err(f, "failed to register video device\n");
 		goto error;
 	}
 
@@ -894,7 +887,7 @@ static void uvc_unbind(struct usb_configuration *c, struct usb_function *f)
 	struct usb_composite_dev *cdev = c->cdev;
 	struct uvc_device *uvc = to_uvc(f);
 
-	INFO(cdev, "%s\n", __func__);
+	uvcg_info(f, "%s\n", __func__);
 
 	device_remove_file(&uvc->vdev.dev, &dev_attr_function_name);
 	video_unregister_device(&uvc->vdev);