• Andrew de Quincey's avatar
    V4L/DVB (3762): Add sysfs device links to dvb devices · d09dbf92
    Andrew de Quincey authored
    Currently in /sys/class/dvb/dvbX.demuxY/ we have:
    	dev
    	uevent
    With the patch, we have (for a PCI DVB device):
    	dev
    	device -> ../../../devices/pci0000:00/0000:00:1e.0/0000:03:0d.0
    	uevent
    So userspace tools can (finally) work out which physical device a DVB adapter
    refers to. Previously you had to kinda look through dmesg and hope that it
    hadn't been dumped out of the buffer. This makes debugging a lot easier if
    the system has been up for a long time!
    This is done by adding an extra 'struct device *' parameter to
    dvb_register_adapter(). It will work with any kind of standard
    linux 'device'. Additionally, if someone has an embedded system which does
    things differently, they can simply supply 'NULL' and the behaviour will be
    as before - the link will simply not appear.
    
    Ack'd-by: Manu Abraham <manu@linuxtv.org>
    Acked-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
    Signed-off-by: default avatarAndrew de Quincey <adq_dvb@lidskialf.net>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
    d09dbf92
budget-core.c 14.6 KB