[media] cx25821: testing the wrong variable

->input_filename could be NULL here.  The intent was to test
->_filename.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/pci/cx25821/cx25821-video-upstream-ch2.c b/drivers/media/pci/cx25821/cx25821-video-upstream-ch2.c
index c8c94fb..d33fc1a 100644
--- a/drivers/media/pci/cx25821/cx25821-video-upstream-ch2.c
+++ b/drivers/media/pci/cx25821/cx25821-video-upstream-ch2.c
@@ -761,7 +761,7 @@
 	}
 
 	/* Default if filename is empty string */
-	if (strcmp(dev->input_filename_ch2, "") == 0) {
+	if (strcmp(dev->_filename_ch2, "") == 0) {
 		if (dev->_isNTSC_ch2) {
 			dev->_filename_ch2 = (dev->_pixel_format_ch2 ==
 				PIXEL_FRMT_411) ? "/root/vid411.yuv" :
diff --git a/drivers/media/pci/cx25821/cx25821-video-upstream.c b/drivers/media/pci/cx25821/cx25821-video-upstream.c
index 52c13e0..6759fff 100644
--- a/drivers/media/pci/cx25821/cx25821-video-upstream.c
+++ b/drivers/media/pci/cx25821/cx25821-video-upstream.c
@@ -808,7 +808,7 @@
 	}
 
 	/* Default if filename is empty string */
-	if (strcmp(dev->input_filename, "") == 0) {
+	if (strcmp(dev->_filename, "") == 0) {
 		if (dev->_isNTSC) {
 			dev->_filename =
 				(dev->_pixel_format == PIXEL_FRMT_411) ?