V4L/DVB (9521): V4L: struct device - replace bus_id with dev_name(), dev_set_name()

This patch is part of a larger patch series which will remove
the "char bus_id[20]" name string from struct device. The device
name is managed in the kobject anyway, and without any size
limitation, and just needlessly copied into "struct device".

To set and read the device name dev_name(dev) and dev_set_name(dev)
must be used. If your code uses static kobjects, which it shouldn't
do, "const char *init_name" can be used to statically provide the
name the registered device should have. At registration time, the
init_name field is cleared, to enforce the use of dev_name(dev) to
access the device name at a later time.

We need to get rid of all occurrences of bus_id in the entire tree
to be able to enable the new interface. Please apply this patch,
and possibly convert any remaining remaining occurrences of bus_id.

We want to submit a patch to -next, which will remove bus_id from
"struct device", to find the remaining pieces to convert, and finally
switch over to the new api, which will remove the 20 bytes array
and does no longer have a size limitation.

Thanks,
Kay
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/bt8xx/bttv-gpio.c

@@ -42,7 +42,7 @@ static int bttv_sub_bus_match(struct device *dev, struct device_driver *drv)
 	struct bttv_sub_driver *sub = to_bttv_sub_drv(drv);
 	int len = strlen(sub->wanted);
 
-	if (0 == strncmp(dev->bus_id, sub->wanted, len))
+	if (0 == strncmp(dev_name(dev), sub->wanted, len))
 		return 1;
 	return 0;
 }
@@ -91,15 +91,14 @@ int bttv_sub_add_device(struct bttv_core *core, char *name)
 	sub->dev.parent  = &core->pci->dev;
 	sub->dev.bus     = &bttv_sub_bus_type;
 	sub->dev.release = release_sub_device;
-	snprintf(sub->dev.bus_id,sizeof(sub->dev.bus_id),"%s%d",
-		 name, core->nr);
+	dev_set_name(&sub->dev, "%s%d", name, core->nr);
 
 	err = device_register(&sub->dev);
 	if (0 != err) {
 		kfree(sub);
 		return err;
 	}
-	printk("bttv%d: add subdevice \"%s\"\n", core->nr, sub->dev.bus_id);
+	printk("bttv%d: add subdevice \"%s\"\n", core->nr, dev_name(&sub->dev));
 	list_add_tail(&sub->list,&core->subs);
 	return 0;
 }

drivers/media/video/bt8xx/bttv.h

@@ -308,7 +308,7 @@ struct bttv_sub_device {
 
 struct bttv_sub_driver {
 	struct device_driver   drv;
-	char                   wanted[BUS_ID_SIZE];
+	char                   wanted[20];
 	int                    (*probe)(struct bttv_sub_device *sub);
 	void                   (*remove)(struct bttv_sub_device *sub);
 };

drivers/media/video/em28xx/em28xx-video.c

@@ -1271,7 +1271,7 @@ static int vidioc_querycap(struct file *file, void  *priv,
 
 	strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
 	strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
-	strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
+	strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
 
 	cap->version = EM28XX_VERSION_CODE;
 
@@ -1424,7 +1424,7 @@ static int radio_querycap(struct file *file, void  *priv,
 
 	strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
 	strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
-	strlcpy(cap->bus_info, dev->udev->dev.bus_id, sizeof(cap->bus_info));
+	strlcpy(cap->bus_info, dev_name(&dev->udev->dev), sizeof(cap->bus_info));
 
 	cap->version = EM28XX_VERSION_CODE;
 	cap->capabilities = V4L2_CAP_TUNER;

drivers/media/video/et61x251/et61x251_core.c

@@ -1581,7 +1581,7 @@ et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
 
 	strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
 	if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
-		strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
+		strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
 			sizeof(cap.bus_info));
 
 	if (copy_to_user(arg, &cap, sizeof(cap)))

drivers/media/video/ir-kbd-i2c.c

@@ -385,10 +385,10 @@ static int ir_attach(struct i2c_adapter *adap, int addr,
 		goto err_out_detach;
 	}
 
-	/* Phys addr can only be set after attaching (for ir->c.dev.bus_id) */
+	/* Phys addr can only be set after attaching (for ir->c.dev) */
 	snprintf(ir->phys, sizeof(ir->phys), "%s/%s/ir0",
-		 ir->c.adapter->dev.bus_id,
-		 ir->c.dev.bus_id);
+		 dev_name(&ir->c.adapter->dev),
+		 dev_name(&ir->c.dev));
 
 	/* init + register input device */
 	ir_input_init(input_dev, &ir->ir, ir_type, ir->ir_codes);

drivers/media/video/pvrusb2/pvrusb2-hdw.c

@@ -2395,7 +2395,7 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
 
 	scnprintf(hdw->bus_info,sizeof(hdw->bus_info),
 		  "usb %s address %d",
-		  hdw->usb_dev->dev.bus_id,
+		  dev_name(&hdw->usb_dev->dev),
 		  hdw->usb_dev->devnum);
 
 	ifnum = hdw->usb_intf->cur_altsetting->desc.bInterfaceNumber;

drivers/media/video/pvrusb2/pvrusb2-sysfs.c

@@ -628,10 +628,10 @@ static void class_dev_create(struct pvr2_sysfs *sfp,
 
 	class_dev->class = &class_ptr->class;
 	if (pvr2_hdw_get_sn(sfp->channel.hdw)) {
-		snprintf(class_dev->bus_id, BUS_ID_SIZE, "sn-%lu",
+		dev_set_name(class_dev, "sn-%lu",
 			 pvr2_hdw_get_sn(sfp->channel.hdw));
 	} else if (pvr2_hdw_get_unit_number(sfp->channel.hdw) >= 0) {
-		snprintf(class_dev->bus_id, BUS_ID_SIZE, "unit-%c",
+		dev_set_name(class_dev, "unit-%c",
 			 pvr2_hdw_get_unit_number(sfp->channel.hdw) + 'a');
 	} else {
 		kfree(class_dev);

drivers/media/video/sh_mobile_ceu_camera.c

@@ -616,7 +616,7 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 
 	/* request irq */
 	err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
-			  pdev->dev.bus_id, pcdev);
+			  dev_name(&pdev->dev), pcdev);
 	if (err) {
 		dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
 		goto exit_release_mem;
@@ -633,8 +633,8 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 	pcdev->ici.priv = pcdev;
 	pcdev->ici.dev.parent = &pdev->dev;
 	pcdev->ici.nr = pdev->id;
-	pcdev->ici.drv_name = pdev->dev.bus_id,
-	pcdev->ici.ops = &sh_mobile_ceu_host_ops,
+	pcdev->ici.drv_name = dev_name(&pdev->dev);
+	pcdev->ici.ops = &sh_mobile_ceu_host_ops;
 
 	err = soc_camera_host_register(&pcdev->ici);
 	if (err)

drivers/media/video/sn9c102/sn9c102_core.c

@@ -2162,7 +2162,7 @@ sn9c102_vidioc_querycap(struct sn9c102_device* cam, void __user * arg)
 
 	strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
 	if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
-		strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
+		strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
 			sizeof(cap.bus_info));
 
 	if (copy_to_user(arg, &cap, sizeof(cap)))

drivers/media/video/soc_camera.c

@@ -783,7 +783,7 @@ int soc_camera_host_register(struct soc_camera_host *ici)
 		return -EINVAL;
 
 	/* Number might be equal to the platform device ID */
-	sprintf(ici->dev.bus_id, "camera_host%d", ici->nr);
+	dev_set_name(&ici->dev, "camera_host%d", ici->nr);
 
 	mutex_lock(&list_lock);
 	list_for_each_entry(ix, &hosts, list) {
@@ -867,8 +867,7 @@ int soc_camera_device_register(struct soc_camera_device *icd)
 
 	icd->devnum = num;
 	icd->dev.bus = &soc_camera_bus_type;
-	snprintf(icd->dev.bus_id, sizeof(icd->dev.bus_id),
-		 "%u-%u", icd->iface, icd->devnum);
+	dev_set_name(&icd->dev, "%u-%u", icd->iface, icd->devnum);
 
 	icd->dev.release = dummy_release;
 

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

@@ -523,7 +523,7 @@ static int vidioc_querycap (struct file *file, void  *priv,
 	strlcpy(vc->card,
 		usbvision_device_data[usbvision->DevModel].ModelString,
 		sizeof(vc->card));
-	strlcpy(vc->bus_info, usbvision->dev->dev.bus_id,
+	strlcpy(vc->bus_info, dev_name(&usbvision->dev->dev),
 		sizeof(vc->bus_info));
 	vc->version = USBVISION_DRIVER_VERSION;
 	vc->capabilities = V4L2_CAP_VIDEO_CAPTURE |

drivers/media/video/v4l2-dev.c

@@ -339,7 +339,7 @@ int video_register_device_index(struct video_device *vfd, int type, int nr,
 	vfd->dev.devt = MKDEV(VIDEO_MAJOR, vfd->minor);
 	if (vfd->parent)
 		vfd->dev.parent = vfd->parent;
-	sprintf(vfd->dev.bus_id, "%s%d", name_base, nr);
+	dev_set_name(&vfd->dev, "%s%d", name_base, nr);
 	ret = device_register(&vfd->dev);
 	if (ret < 0) {
 		printk(KERN_ERR "%s: device_register failed\n", __func__);

drivers/media/video/zc0301/zc0301_core.c

@@ -1020,7 +1020,7 @@ zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg)
 
 	strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
 	if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
-		strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
+		strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
 			sizeof(cap.bus_info));
 
 	if (copy_to_user(arg, &cap, sizeof(cap)))

include/media/soc_camera.h

@@ -56,7 +56,7 @@ struct soc_camera_host {
 	struct device dev;
 	unsigned char nr;				/* Host number */
 	void *priv;
-	char *drv_name;
+	const char *drv_name;
 	struct soc_camera_host_ops *ops;
 };
 
@@ -107,7 +107,7 @@ extern int soc_camera_video_start(struct soc_camera_device *icd);
 extern void soc_camera_video_stop(struct soc_camera_device *icd);
 
 struct soc_camera_data_format {
-	char *name;
+	const char *name;
 	unsigned int depth;
 	__u32 fourcc;
 	enum v4l2_colorspace colorspace;