From: Ian Abbott <abbotti@mev.co.uk>
Date: Mon, 7 Jan 2008 11:05:21 +0000 (+0000)
Subject: Only set SRF_RT subdevice flag if comedi_switch_to_rt(dev) succeeds.
X-Git-Tag: v0_7_76~12
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=ba94fab792c6e6369f2fa87106023cf576b9fc78;p=comedi.git

Only set SRF_RT subdevice flag if comedi_switch_to_rt(dev) succeeds.
---

diff --git a/comedi/comedi_fops.c b/comedi/comedi_fops.c
index 181cd032..e182e509 100644
--- a/comedi/comedi_fops.c
+++ b/comedi/comedi_fops.c
@@ -1051,8 +1051,8 @@ static int do_cmd_ioctl(comedi_device * dev, void *arg, void *file)
 
 #ifdef CONFIG_COMEDI_RT
 	if (async->cmd.flags & TRIG_RT) {
-		comedi_switch_to_rt(dev);
-		comedi_set_subdevice_runflags(s, SRF_RT, SRF_RT);
+		if (comedi_switch_to_rt(dev) == 0)
+			comedi_set_subdevice_runflags(s, SRF_RT, SRF_RT);
 	}
 #endif