V4L/DVB (10502): saa7146: move v4l2 device registration to saa7146_vv.

Doing the v4l2_device registration in the saa7146 core will make it
dependent on v4l2, even for DVB-only boards. This registration and
unregistration belongs in saa7146_vv instead.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 16 insertions, 9 deletions

diff --git a/drivers/media/common/saa7146_core.c b/drivers/media/common/saa7146_core.c
index a123844eb656..982f000a57ff 100644
--- a/drivers/media/common/saa7146_core.c
+++ b/drivers/media/common/saa7146_core.c
@@ -363,16 +363,13 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
                 ERR(("out of memory.\n"));
                 goto out;
         }
-        err = v4l2_device_register(&pci->dev, &dev->v4l2_dev);
-        if (err)
-                goto err_free;
 
         DEB_EE(("pci:%p\n",pci));
 
         err = pci_enable_device(pci);
         if (err < 0) {
                 ERR(("pci_enable_device() failed.\n"));
-                goto err_unreg;
+                goto err_free;
         }
 
         /* enable bus-mastering */
@@ -480,6 +477,10 @@ static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent
                 DEB_D(("ext->attach() failed for %p. skipping device.\n",dev));
                 goto err_free_i2c;
         }
+        /* V4L extensions will set the pci drvdata to the v4l2_device in the
+           attach() above. So for those cards that do not use V4L we have to
+           set it explicitly. */
+        pci_set_drvdata(pci, &dev->v4l2_dev);
 
         INIT_LIST_HEAD(&dev->item);
         list_add_tail(&dev->item,&saa7146_devices);
@@ -506,8 +507,6 @@ err_release:
         pci_release_region(pci, 0);
 err_disable:
         pci_disable_device(pci);
-err_unreg:
-        v4l2_device_unregister(&dev->v4l2_dev);
 err_free:
         kfree(dev);
         goto out;
@@ -530,7 +529,8 @@ static void saa7146_remove_one(struct pci_dev *pdev)
         DEB_EE(("dev:%p\n",dev));
 
         dev->ext->detach(dev);
-        v4l2_device_unregister(&dev->v4l2_dev);
+        /* Zero the PCI drvdata after use. */
+        pci_set_drvdata(pdev, NULL);
 
         /* shut down all video dma transfers */
         saa7146_write(dev, MC1, 0x00ff0000);
diff --git a/drivers/media/common/saa7146_fops.c b/drivers/media/common/saa7146_fops.c
index fec799d2600f..620f655fa9c5 100644
--- a/drivers/media/common/saa7146_fops.c
+++ b/drivers/media/common/saa7146_fops.c
@@ -446,11 +446,17 @@ static void vv_callback(struct saa7146_dev *dev, unsigned long status)
 
 int saa7146_vv_init(struct saa7146_dev* dev, struct saa7146_ext_vv *ext_vv)
 {
-        struct saa7146_vv *vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
+        struct saa7146_vv *vv;
+        int err;
+
+        err = v4l2_device_register(&dev->pci->dev, &dev->v4l2_dev);
+        if (err)
+                return err;
 
+        vv = kzalloc(sizeof(struct saa7146_vv), GFP_KERNEL);
         if (vv == NULL) {
                 ERR(("out of memory. aborting.\n"));
-                return -1;
+                return -ENOMEM;
         }
         ext_vv->ops = saa7146_video_ioctl_ops;
         ext_vv->core_ops = &saa7146_video_ioctl_ops;
@@ -496,6 +502,7 @@ int saa7146_vv_release(struct saa7146_dev* dev)
 
         DEB_EE(("dev:%p\n",dev));
 
+        v4l2_device_unregister(&dev->v4l2_dev);
         pci_free_consistent(dev->pci, SAA7146_CLIPPING_MEM, vv->d_clipping.cpu_addr, vv->d_clipping.dma_handle);
         kfree(vv);
         dev->vv_data = NULL;