diff options
| -rw-r--r-- | drivers/media/video/usbvideo/usbvideo.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/drivers/media/video/usbvideo/usbvideo.c b/drivers/media/video/usbvideo/usbvideo.c index d34d8c8b737..687f026753b 100644 --- a/drivers/media/video/usbvideo/usbvideo.c +++ b/drivers/media/video/usbvideo/usbvideo.c @@ -628,24 +628,21 @@ EXPORT_SYMBOL(usbvideo_HexDump); /* ******************************************************************** */ /* XXX: this piece of crap really wants some error handling.. */ -static void usbvideo_ClientIncModCount(struct uvd *uvd) +static int usbvideo_ClientIncModCount(struct uvd *uvd) { if (uvd == NULL) { err("%s: uvd == NULL", __FUNCTION__); - return; + return -EINVAL; } if (uvd->handle == NULL) { err("%s: uvd->handle == NULL", __FUNCTION__); - return; - } - if (uvd->handle->md_module == NULL) { - err("%s: uvd->handle->md_module == NULL", __FUNCTION__); - return; + return -EINVAL; } if (!try_module_get(uvd->handle->md_module)) { err("%s: try_module_get() == 0", __FUNCTION__); - return; + return -ENODEV; } + return 0; } static void usbvideo_ClientDecModCount(struct uvd *uvd) @@ -712,8 +709,6 @@ int usbvideo_register( cams->num_cameras = num_cams; cams->cam = (struct uvd *) &cams[1]; cams->md_module = md; - if (cams->md_module == NULL) - warn("%s: module == NULL!", __FUNCTION__); mutex_init(&cams->lock); /* to 1 == available */ for (i = 0; i < num_cams; i++) { @@ -1119,7 +1114,8 @@ static int usbvideo_v4l_open(struct inode *inode, struct file *file) if (uvd->debug > 1) info("%s($%p)", __FUNCTION__, dev); - usbvideo_ClientIncModCount(uvd); + if (0 < usbvideo_ClientIncModCount(uvd)) + return -ENODEV; mutex_lock(&uvd->lock); if (uvd->user) { |