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V4L/DVB: s2255drv: adding v4l2_device structure. video_register_device cleanup 

adding v4l2_device structure.
if one video_register_device call fails, allows use of other devices
or channels.

Signed-off-by: Dean Anderson <dean@sensoray.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Dean Anderson 2010-04-08 23:52:20 -03:00 committed by Mauro Carvalho Chehab
parent 85b85482c2
commit 3a67b5cc6f
1 changed files with 27 additions and 11 deletions
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38
drivers/media/video/s2255drv.c
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@ -52,6 +52,7 @@
#include <linux/smp_lock.h>
#include <media/videobuf-vmalloc.h>
#include <media/v4l2-common.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <linux/vmalloc.h>
#include <linux/usb.h>
@ -81,7 +82,6 @@
#define S2255_DEF_BUFS 16
#define S2255_SETMODE_TIMEOUT 500
#define S2255_VIDSTATUS_TIMEOUT 350
#define MAX_CHANNELS 4
#define S2255_MARKER_FRAME cpu_to_le32(0x2255DA4AL)
#define S2255_MARKER_RESPONSE cpu_to_le32(0x2255ACACL)
#define S2255_RESPONSE_SETMODE cpu_to_le32(0x01)
@ -229,6 +229,8 @@ struct s2255_fmt; /*forward declaration */
struct s2255_dev {
struct video_device vdev[MAX_CHANNELS];
struct v4l2_device v4l2_dev[MAX_CHANNELS];
int channels; /* number of channels registered */
int frames;
struct mutex lock;
struct mutex open_lock;
@ -1710,7 +1712,8 @@ static int s2255_open(struct file *file)
int state;
dprintk(1, "s2255: open called (dev=%s)\n",
video_device_node_name(vdev));
for (i = 0; i < MAX_CHANNELS; i++)
for (i = 0; i < dev->channels; i++)
if (&dev->vdev[i] == vdev) {
cur_channel = i;
break;
@ -1944,7 +1947,11 @@ static int s2255_probe_v4l(struct s2255_dev *dev)
int ret;
int i;
int cur_nr = video_nr;
for (i = 0; i < MAX_CHANNELS; i++) {
ret = v4l2_device_register(&dev->udev->dev, &dev->v4l2_dev[i]);
if (ret)
goto unreg_v4l2;
}
/* initialize all video 4 linux */
/* register 4 video devices */
for (i = 0; i < MAX_CHANNELS; i++) {
@ -1963,16 +1970,29 @@ static int s2255_probe_v4l(struct s2255_dev *dev)
VFL_TYPE_GRABBER,
cur_nr + i);
video_set_drvdata(&dev->vdev[i], dev);
if (ret != 0) {
if (ret) {
dev_err(&dev->udev->dev,
"failed to register video device!\n");
return ret;
break;
}
dev->channels++;
v4l2_info(&dev->v4l2_dev[i], "V4L2 device registered as %s\n",
video_device_node_name(&dev->vdev[i]));
}
printk(KERN_INFO "Sensoray 2255 V4L driver Revision: %d.%d\n",
S2255_MAJOR_VERSION,
S2255_MINOR_VERSION);
/* if no channels registered, return error and probe will fail*/
if (dev->channels == 0)
return ret;
if (dev->channels != MAX_CHANNELS)
printk(KERN_WARNING "s2255: Not all channels available.\n");
return 0;
unreg_v4l2:
for (i-- ; i > 0; i--)
v4l2_device_unregister(&dev->v4l2_dev[i]);
return ret;
}
@ -2637,13 +2657,9 @@ static int s2255_probe(struct usb_interface *interface,
/* loads v4l specific */
retval = s2255_probe_v4l(dev);
if (retval)
goto errorV4L;
goto errorBOARDINIT;
dev_info(&interface->dev, "Sensoray 2255 detected\n");
return 0;
errorV4L:
for (i = 0; i < MAX_CHANNELS; i++)
if (video_is_registered(&dev->vdev[i]))
video_unregister_device(&dev->vdev[i]);
errorBOARDINIT:
s2255_board_shutdown(dev);
errorFWMARKER: