El día 14 de febrero de 2012 19:42, Greg KH <greg@xxxxxxxxx> escribió: > On Tue, Feb 14, 2012 at 07:05:48PM -0300, Ezequiel García wrote: >> I noticed that after registering a video driver with >> "video_register_device" the "open" function gets called. >> The registration is like: >> >> peasycap->video_device.fops = &v4l2_fops; >> peasycap->video_device.minor = -1; >> peasycap->video_device.release = (void *)(&videodev_release); >> >> video_set_drvdata(&(peasycap->video_device), (void *)peasycap); >> >> First question: who calls it and why does it open the device? > > Userspace probably. > I find hard that userspace is who opens the device in this particular case, because I get the "open" call just by plugging in the usb, right after usb_probe. (unless there is a daemon, or udev opens the device for module insertion or something). I will investigate this further. Thanks, Ezequiel. _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
