tree 69be4a6240defb3e3138689c2cc7c91a779f7816
parent a75831f3600c479054fc3f70cd11257ab07886e2
author Juergen Lock <nox@jelal.kn-bremen.de> 1356294186 -0300
committer Mauro Carvalho Chehab <mchehab@redhat.com> 1356630197 -0200

[media] dvb_frontend: fix ioctls failing if frontend open/closed too fast

That likely fixes this MythTV ticket:
	http://code.mythtv.org/trac/ticket/10830
(which btw affects all usb tuners I tested as well, pctv452e,
dib0700, af9015)  pctv452e is still possibly broken with MythTV
even after this fix; it does work with VDR here tho despite I2C
errors.
Reduced testcase:
	http://people.freebsd.org/~nox/tmp/ioctltst.c
Thanx to devinheitmueller and crope from #linuxtv for helping with
this fix! :)

Signed-off-by: Juergen Lock <nox@jelal.kn-bremen.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>