V4L/DVB: s2255drv: video_device_alloc call not checked fix

call to video_device_alloc was not being checked in probe function.
code simplified and uses video_device inside device structure.

Signed-off-by: Dean Anderson <dean@sensoray.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c
index 91f7e9538f6e3173b65a5b2387bdefdabeaf4989..4c5d3672e2db1f0cb4ffafa37c8b129647551ac6 100644 (file)
--- a/drivers/media/video/s2255drv.c
+++ b/drivers/media/video/s2255drv.c
@@ -224,6 +224,7 @@ struct s2255_pipeinfo {
 struct s2255_fmt; /*forward declaration */
 
 struct s2255_dev {
+       struct video_device     vdev[MAX_CHANNELS];
        int                     frames;
        struct mutex            lock;
        struct mutex            open_lock;
@@ -233,7 +234,6 @@ struct s2255_dev {
        u8                      read_endpoint;
 
        struct s2255_dmaqueue   vidq[MAX_CHANNELS];
-       struct video_device     *vdev[MAX_CHANNELS];
        struct timer_list       timer;
        struct s2255_fw *fw_data;
        struct s2255_pipeinfo   pipe;
@@ -719,10 +719,10 @@ static int buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
        if (fh->fmt == NULL)
                return -EINVAL;
 
-       if ((fh->width < norm_minw(fh->dev->vdev[fh->channel])) ||
-           (fh->width > norm_maxw(fh->dev->vdev[fh->channel])) ||
-           (fh->height < norm_minh(fh->dev->vdev[fh->channel])) ||
-           (fh->height > norm_maxh(fh->dev->vdev[fh->channel]))) {
+       if ((fh->width < norm_minw(&fh->dev->vdev[fh->channel])) ||
+           (fh->width > norm_maxw(&fh->dev->vdev[fh->channel])) ||
+           (fh->height < norm_minh(&fh->dev->vdev[fh->channel])) ||
+           (fh->height > norm_maxh(&fh->dev->vdev[fh->channel]))) {
                dprintk(4, "invalid buffer prepare\n");
                return -EINVAL;
        }
@@ -896,7 +896,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
        int is_ntsc;
 
        is_ntsc =
-           (dev->vdev[fh->channel]->current_norm & V4L2_STD_NTSC) ? 1 : 0;
+           (dev->vdev[fh->channel].current_norm & V4L2_STD_NTSC) ? 1 : 0;
 
        fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 
@@ -1029,9 +1029,9 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
        fh->height = f->fmt.pix.height;
        fh->vb_vidq.field = f->fmt.pix.field;
        fh->type = f->type;
-       norm = norm_minw(fh->dev->vdev[fh->channel]);
-       if (fh->width > norm_minw(fh->dev->vdev[fh->channel])) {
-               if (fh->height > norm_minh(fh->dev->vdev[fh->channel])) {
+       norm = norm_minw(&fh->dev->vdev[fh->channel]);
+       if (fh->width > norm_minw(&fh->dev->vdev[fh->channel])) {
+               if (fh->height > norm_minh(&fh->dev->vdev[fh->channel])) {
                        if (fh->dev->cap_parm[fh->channel].capturemode &
                            V4L2_MODE_HIGHQUALITY) {
                                fh->mode.scale = SCALE_4CIFSI;
@@ -1755,7 +1755,7 @@ static int s2255_open(struct file *file)
                video_device_node_name(vdev));
        lock_kernel();
        for (i = 0; i < MAX_CHANNELS; i++)
-               if (dev->vdev[i] == vdev) {
+               if (&dev->vdev[i] == vdev) {
                        cur_channel = i;
                        break;
                }
@@ -1985,7 +1985,6 @@ static const struct v4l2_ioctl_ops s2255_ioctl_ops = {
 static void s2255_video_device_release(struct video_device *vdev)
 {
        struct s2255_dev *dev = video_get_drvdata(vdev);
-       video_device_release(vdev);
        kref_put(&dev->kref, s2255_destroy);
        return;
 }
@@ -2012,19 +2011,18 @@ static int s2255_probe_v4l(struct s2255_dev *dev)
                dev->vidq[i].dev = dev;
                dev->vidq[i].channel = i;
                /* register 4 video devices */
-               dev->vdev[i] = video_device_alloc();
-               memcpy(dev->vdev[i], &template, sizeof(struct video_device));
-               dev->vdev[i]->parent = &dev->interface->dev;
-               video_set_drvdata(dev->vdev[i], dev);
+               memcpy(&dev->vdev[i], &template, sizeof(struct video_device));
+               dev->vdev[i].parent = &dev->interface->dev;
+               video_set_drvdata(&dev->vdev[i], dev);
                if (video_nr == -1)
-                       ret = video_register_device(dev->vdev[i],
+                       ret = video_register_device(&dev->vdev[i],
                                                    VFL_TYPE_GRABBER,
                                                    video_nr);
                else
-                       ret = video_register_device(dev->vdev[i],
+                       ret = video_register_device(&dev->vdev[i],
                                                    VFL_TYPE_GRABBER,
                                                    cur_nr + i);
-               video_set_drvdata(dev->vdev[i], dev);
+               video_set_drvdata(&dev->vdev[i], dev);
 
                if (ret != 0) {
                        dev_err(&dev->udev->dev,
@@ -2721,8 +2719,8 @@ static int s2255_probe(struct usb_interface *interface,
        return 0;
 errorV4L:
        for (i = 0; i < MAX_CHANNELS; i++)
-               if (dev->vdev[i] && video_is_registered(dev->vdev[i]))
-                       video_unregister_device(dev->vdev[i]);
+               if (video_is_registered(&dev->vdev[i]))
+                       video_unregister_device(&dev->vdev[i]);
 errorBOARDINIT:
        s2255_board_shutdown(dev);
 errorFWMARKER:
@@ -2755,8 +2753,8 @@ static void s2255_disconnect(struct usb_interface *interface)
        dev = usb_get_intfdata(interface);
        /* unregister each video device. */
        for (i = 0; i < MAX_CHANNELS; i++)
-               if (video_is_registered(dev->vdev[i]))
-                       video_unregister_device(dev->vdev[i]);
+               if (video_is_registered(&dev->vdev[i]))
+                       video_unregister_device(&dev->vdev[i]);
        /* wake up any of our timers */
        atomic_set(&dev->fw_data->fw_state, S2255_FW_DISCONNECTING);
        wake_up(&dev->fw_data->wait_fw);