diff options
Diffstat (limited to 'drivers/media/video/gspca/gspca.c')
| -rw-r--r-- | drivers/media/video/gspca/gspca.c | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index e48fbfc8ad05..748a87e82e44 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -646,15 +646,14 @@ static void gspca_stream_off(struct gspca_dev *gspca_dev) { gspca_dev->streaming = 0; atomic_set(&gspca_dev->nevent, 0); - if (gspca_dev->present) { - if (gspca_dev->sd_desc->stopN) - gspca_dev->sd_desc->stopN(gspca_dev); - destroy_urbs(gspca_dev); - gspca_set_alt0(gspca_dev); - if (gspca_dev->sd_desc->stop0) - gspca_dev->sd_desc->stop0(gspca_dev); - PDEBUG(D_STREAM, "stream off OK"); - } + if (gspca_dev->present + && gspca_dev->sd_desc->stopN) + gspca_dev->sd_desc->stopN(gspca_dev); + destroy_urbs(gspca_dev); + gspca_set_alt0(gspca_dev); + if (gspca_dev->sd_desc->stop0) + gspca_dev->sd_desc->stop0(gspca_dev); + PDEBUG(D_STREAM, "stream off OK"); } static void gspca_set_default_mode(struct gspca_dev *gspca_dev) @@ -863,7 +862,7 @@ static int dev_open(struct inode *inode, struct file *file) int ret; PDEBUG(D_STREAM, "%s open", current->comm); - gspca_dev = (struct gspca_dev *) video_devdata(file); + gspca_dev = video_drvdata(file); if (mutex_lock_interruptible(&gspca_dev->queue_lock)) return -ERESTARTSYS; if (!gspca_dev->present) { @@ -875,6 +874,13 @@ static int dev_open(struct inode *inode, struct file *file) ret = -EBUSY; goto out; } + + /* protect the subdriver against rmmod */ + if (!try_module_get(gspca_dev->module)) { + ret = -ENODEV; + goto out; + } + gspca_dev->users++; /* one more user */ @@ -884,10 +890,10 @@ static int dev_open(struct inode *inode, struct file *file) #ifdef GSPCA_DEBUG /* activate the v4l2 debug */ if (gspca_debug & D_V4L2) - gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL + gspca_dev->vdev->debug |= V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG; else - gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL + gspca_dev->vdev->debug &= ~(V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG); #endif ret = 0; @@ -921,6 +927,7 @@ static int dev_close(struct inode *inode, struct file *file) gspca_dev->memory = GSPCA_MEMORY_NO; } file->private_data = NULL; + module_put(gspca_dev->module); mutex_unlock(&gspca_dev->queue_lock); PDEBUG(D_STREAM, "close done"); @@ -1748,11 +1755,6 @@ out: return ret; } -static void dev_release(struct video_device *vfd) -{ - /* nothing */ -} - static struct file_operations dev_fops = { .owner = THIS_MODULE, .open = dev_open, @@ -1800,7 +1802,7 @@ static struct video_device gspca_template = { .name = "gspca main driver", .fops = &dev_fops, .ioctl_ops = &dev_ioctl_ops, - .release = dev_release, /* mandatory */ + .release = video_device_release, .minor = -1, }; @@ -1869,17 +1871,18 @@ int gspca_dev_probe(struct usb_interface *intf, init_waitqueue_head(&gspca_dev->wq); /* init video stuff */ - memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); - gspca_dev->vdev.parent = &dev->dev; - memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); - gspca_dev->vdev.fops = &gspca_dev->fops; - gspca_dev->fops.owner = module; /* module protection */ + gspca_dev->vdev = video_device_alloc(); + memcpy(gspca_dev->vdev, &gspca_template, sizeof gspca_template); + gspca_dev->vdev->parent = &dev->dev; + gspca_dev->module = module; gspca_dev->present = 1; - ret = video_register_device(&gspca_dev->vdev, + video_set_drvdata(gspca_dev->vdev, gspca_dev); + ret = video_register_device(gspca_dev->vdev, VFL_TYPE_GRABBER, video_nr); if (ret < 0) { err("video_register_device err %d", ret); + video_device_release(gspca_dev->vdev); goto out; } @@ -1887,7 +1890,8 @@ int gspca_dev_probe(struct usb_interface *intf, PDEBUG(D_PROBE, "probe ok"); return 0; out: - kref_put(&gspca_dev->kref, gspca_delete); + kfree(gspca_dev->usb_buf); + kfree(gspca_dev); return ret; } EXPORT_SYMBOL(gspca_dev_probe); @@ -1905,7 +1909,7 @@ void gspca_disconnect(struct usb_interface *intf) usb_set_intfdata(intf, NULL); /* We don't want people trying to open up the device */ - video_unregister_device(&gspca_dev->vdev); + video_unregister_device(gspca_dev->vdev); gspca_dev->present = 0; gspca_dev->streaming = 0; |