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Subject[PATCH 2/2] media: davinci: vpif_display: embed video_device struct in channel_obj
Date
From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>

Embed video_device struct (video_dev) in channel_obj and also the
Unregister path doesn't need to free the video_device structure,
hence, change the video_device.release callback point to
video_device_release_empty.

Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
---
drivers/media/platform/davinci/vpif_display.c | 49 +++++----------------------
drivers/media/platform/davinci/vpif_display.h | 2 +-
2 files changed, 10 insertions(+), 41 deletions(-)

diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
index 839c24d..682e5d5 100644
--- a/drivers/media/platform/davinci/vpif_display.c
+++ b/drivers/media/platform/davinci/vpif_display.c
@@ -829,7 +829,7 @@ static int vpif_set_output(struct vpif_display_config *vpif_cfg,
ch->sd = sd;
if (chan_cfg->outputs != NULL)
/* update tvnorms from the sub device output info */
- ch->video_dev->tvnorms = chan_cfg->outputs[index].output.std;
+ ch->video_dev.tvnorms = chan_cfg->outputs[index].output.std;
return 0;
}

@@ -1204,16 +1204,16 @@ static int vpif_probe_complete(void)
ch, &ch->video_dev);

/* Initialize the video_device structure */
- vdev = ch->video_dev;
+ vdev = &ch->video_dev;
strlcpy(vdev->name, VPIF_DRIVER_NAME, sizeof(vdev->name));
- vdev->release = video_device_release;
+ vdev->release = video_device_release_empty;
vdev->fops = &vpif_fops;
vdev->ioctl_ops = &vpif_ioctl_ops;
vdev->v4l2_dev = &vpif_obj.v4l2_dev;
vdev->vfl_dir = VFL_DIR_TX;
vdev->queue = q;
vdev->lock = &common->lock;
- video_set_drvdata(ch->video_dev, ch);
+ video_set_drvdata(&ch->video_dev, ch);
err = video_register_device(vdev, VFL_TYPE_GRABBER,
(j ? 3 : 2));
if (err < 0)
@@ -1227,9 +1227,7 @@ probe_out:
ch = vpif_obj.dev[k];
common = &ch->common[k];
vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
- video_unregister_device(ch->video_dev);
- video_device_release(ch->video_dev);
- ch->video_dev = NULL;
+ video_unregister_device(&ch->video_dev);
}
return err;
}
@@ -1246,13 +1244,11 @@ static int vpif_async_complete(struct v4l2_async_notifier *notifier)
static __init int vpif_probe(struct platform_device *pdev)
{
struct vpif_subdev_info *subdevdata;
- int i, j = 0, err = 0;
- int res_idx = 0;
struct i2c_adapter *i2c_adap;
- struct channel_obj *ch;
- struct video_device *vfd;
struct resource *res;
int subdev_count;
+ int res_idx = 0;
+ int i, err;

vpif_dev = &pdev->dev;
err = initialize_vpif();
@@ -1281,25 +1277,6 @@ static __init int vpif_probe(struct platform_device *pdev)
res_idx++;
}

- for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
- /* Get the pointer to the channel object */
- ch = vpif_obj.dev[i];
-
- /* Allocate memory for video device */
- vfd = video_device_alloc();
- if (vfd == NULL) {
- for (j = 0; j < i; j++) {
- ch = vpif_obj.dev[j];
- video_device_release(ch->video_dev);
- }
- err = -ENOMEM;
- goto vpif_unregister;
- }
-
- /* Set video_dev to the video device */
- ch->video_dev = vfd;
- }
-
vpif_obj.config = pdev->dev.platform_data;
subdev_count = vpif_obj.config->subdev_count;
subdevdata = vpif_obj.config->subdevinfo;
@@ -1308,7 +1285,7 @@ static __init int vpif_probe(struct platform_device *pdev)
if (vpif_obj.sd == NULL) {
vpif_err("unable to allocate memory for subdevice pointers\n");
err = -ENOMEM;
- goto vpif_sd_error;
+ goto vpif_unregister;
}

if (!vpif_obj.config->asd_sizes) {
@@ -1348,12 +1325,6 @@ static __init int vpif_probe(struct platform_device *pdev)

probe_subdev_out:
kfree(vpif_obj.sd);
-vpif_sd_error:
- for (i = 0; i < VPIF_DISPLAY_MAX_DEVICES; i++) {
- ch = vpif_obj.dev[i];
- /* Note: does nothing if ch->video_dev == NULL */
- video_device_release(ch->video_dev);
- }
vpif_unregister:
v4l2_device_unregister(&vpif_obj.v4l2_dev);

@@ -1379,9 +1350,7 @@ static int vpif_remove(struct platform_device *device)
common = &ch->common[VPIF_VIDEO_INDEX];
vb2_dma_contig_cleanup_ctx(common->alloc_ctx);
/* Unregister video device */
- video_unregister_device(ch->video_dev);
-
- ch->video_dev = NULL;
+ video_unregister_device(&ch->video_dev);
kfree(vpif_obj.dev[i]);
}

diff --git a/drivers/media/platform/davinci/vpif_display.h b/drivers/media/platform/davinci/vpif_display.h
index 7b21a76..849e0e3 100644
--- a/drivers/media/platform/davinci/vpif_display.h
+++ b/drivers/media/platform/davinci/vpif_display.h
@@ -100,7 +100,7 @@ struct common_obj {

struct channel_obj {
/* V4l2 specific parameters */
- struct video_device *video_dev; /* Identifies video device for
+ struct video_device video_dev; /* Identifies video device for
* this channel */
u32 field_id; /* Indicates id of the field
* which is being displayed */
--
2.1.0


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