V4L/DVB (7394): saa7134: add number of devices check

This patch fixes reported problems when trying to add a 9th device into a
system.

Signed-off-by: Alan McIvor <alan.mcivor@reveal.co.nz>
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index 5992738..eec1278 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -866,6 +866,9 @@
 	int err;
 	int mask;
 
+	if (saa7134_devcount == SAA7134_MAXBOARDS)
+		return -ENOMEM;
+
 	dev = kzalloc(sizeof(*dev),GFP_KERNEL);
 	if (NULL == dev)
 		return -ENOMEM;